diff --git a/AggroMiner/AggroMiner.ts b/AggroMiner/AggroMiner.ts
index 8fd15df..c97b141 100644
--- a/AggroMiner/AggroMiner.ts
+++ b/AggroMiner/AggroMiner.ts
@@ -6,7 +6,7 @@
  * Loadout: regen 3, thrusters 3, mine 1
  * To be tougher, can substitute armor for thrusters or regen.
  */
-const update = function() {
+update = function() {
     // Controls EWMA limits: for mine-only we want to keep this pretty tight
     const TEAM_MIN_DIST = 2.5;
     const TEAM_MAX_DIST = 6;
diff --git a/ArtilleryMicro/ArtilleryMicro.ts b/ArtilleryMicro/ArtilleryMicro.ts
index 63bce74..b0bd178 100644
--- a/ArtilleryMicro/ArtilleryMicro.ts
+++ b/ArtilleryMicro/ArtilleryMicro.ts
@@ -4,7 +4,7 @@
  * Defense loadout: artillery 3, shield/reflect 3, thrusters 1
  * Offense loadout: artillery 2, regen 3, thrusters 1, mine 1
  */
-const update = function() {
+update = function() {
     // Controls whether artillery attack without sensors
     const AGGRESSIVE = false;
     // Controls EWMA limits: these can be a bit higher than for missiles
diff --git a/LaserSquad/LaserSquad.ts b/LaserSquad/LaserSquad.ts
new file mode 100644
index 0000000..214a6c4
--- /dev/null
+++ b/LaserSquad/LaserSquad.ts
@@ -0,0 +1,270 @@
+/**
+ * Laser Squad
+ *
+ * A laser team that holds a diagonal formation in order to take advantage of
+ * the range and damage of lasers without the weaknesses. Can also lay mines.
+ *
+ * Example loadouts:
+ * - laser 3, shield 3, mine 1 (defensive)
+ * - laser 3, thrusters 3, mine 1 (fast mine carpet)
+ */
+type StuckSide = "edge_rear" | "edge_side";
+type Order = Direction | StuckSide | "clear" | "active";
+
+// Globals
+declare let TEAM_SIZE, lastHBCount;
+
+init = function() {
+    // Initialize the array.
+    saveOrder("active");
+    initHeartbeat();
+    TEAM_SIZE = 4;
+    debugLog("starting team size", TEAM_SIZE);
+};
+
+update = function() {
+    const SHIELD_RANGE = 5;
+
+    // Laser squad data has 3 states:
+    // - 'active': default state, lay mines or fire lasers.
+    // - 'clear': no enemies seen, can accept a move order.
+    // - 'edge_rear', 'edge_side': the bot is against a wall and cannot move
+    //   back or sideways.
+    // - <direction>: one bot decided to move, so we all move in this direction.
+    //
+    // Rules:
+    // - Move orders are always followed first if received.
+    // - Reverse move orders can be issued by any bot, if no one on the team is
+    //   stuck.
+    // - Forward move orders are only issued if all bots in the squad show
+    //   'clear':
+    //
+    // In default state, do the following:
+    // 1. Fire at visible enemies
+    // 2. Lay mines
+    // 3. Blind-fire lasers
+    const observedTeamSize = updateHeartbeat();
+    if (observedTeamSize < TEAM_SIZE) {
+        debugLog("seems someone died, team size", observedTeamSize);
+        resetTeamState();
+    }
+    TEAM_SIZE = observedTeamSize;
+
+    const order = getOrder();
+    let state: Order = "active";
+
+    // If we need to move to maintain formation, always do that first.
+    if (isDirection(order)) {
+        if (canMove(order)) {
+            saveOrder(state); // active
+            move(order);
+        }
+    } else {
+        // Only if we didn't try to process a directional move
+        // Check if we're against a wall
+        if (x == 0) {
+            state = "edge_rear";
+            saveOrder(state);
+        } else if (y == 0 || y == arenaHeight - 1) {
+            state = "edge_side";
+            saveOrder(state);
+        }
+    }
+
+    // Do we see anything nearby?
+    const closestEnemy = findEntity(
+        ENEMY,
+        ANYTHING,
+        SORT_BY_DISTANCE,
+        SORT_ASCENDING
+    );
+    if (!exists(closestEnemy)) {
+        if (!isStuck(state)) {
+            state = "clear";
+            saveOrder(state);
+        }
+        tryShieldFriendlyBots(SHIELD_RANGE);
+        tryLayMine();
+        // If we don't see anything and can activate sensors, go ahead.
+        // tryActivateSensors();
+        // Sensors and still don't see anything?
+        tryTeamMoveForward();
+
+        // If we still haven't moved at this point, just blind fire lasers.
+        blindFireLasers();
+    }
+
+    const closestEnemyBot = findEntity(
+        ENEMY,
+        BOT,
+        SORT_BY_DISTANCE,
+        SORT_ASCENDING
+    );
+    if (!exists(closestEnemyBot)) {
+        // TODO: set to 'clear' if the enemy chip or CPU is not in firing range.
+
+        // Not clear, chip or CPU.
+        tryShieldFriendlyBots(SHIELD_RANGE);
+        tryLayMine();
+        tryFireLasers();
+        blindFireLasers();
+    }
+
+    // Now we know there's a bot nearby.
+    if (!isStuck(state)) {
+        state = "active";
+        saveOrder(state);
+    }
+
+    const numEnemyBots = size(findEntities(ENEMY, BOT, false));
+    const enemyBotDistance = getDistanceTo(closestEnemyBot);
+
+    if (enemyBotDistance < 3.1 || numEnemyBots > 2) {
+        tryTeamMoveBack();
+    }
+
+    if (enemyBotDistance < 5.1) {
+        // Defenses
+        tryShieldFriendlyBots(SHIELD_RANGE);
+        tryReflect();
+        if (!isShielded()) tryShieldSelf();
+        // Weapons
+        tryFireLasers();
+        tryLayMine();
+    }
+
+    // Last resort moves
+    tryFireLasers();
+    tryLayMine();
+    blindFireLasers();
+};
+
+const initHeartbeat = function() {
+    if (sharedC == undefined) sharedC = 0;
+    sharedC = sharedC + 1;
+    lastHBCount = sharedC;
+    debugLog("starting count", lastHBCount);
+};
+
+const updateHeartbeat = function() {
+    sharedC = sharedC + 1;
+    const botsAlive = sharedC - lastHBCount;
+    lastHBCount = sharedC;
+    return botsAlive;
+};
+
+/**
+ * If all bots on the team show 'clear' or against edge, we can issue a move forward.
+ */
+const tryTeamMoveForward = function() {
+    // Load shared data
+    array1 = sharedD;
+    array2 = sharedE;
+
+    debugLog("trying forward", array1);
+
+    // Check if everyone can move forward.
+    let i = 0;
+    for (i = 0; i < size(array1); i++) {
+        const val = array1[i] as Order;
+        if (val !== "clear" && val !== "edge_rear" && val !== "edge_side") {
+            // We can't move forward
+            return;
+        }
+    }
+
+    debugLog("Starting team forward move");
+    // We can! Tell everyone to move forward.
+    const me = getEntityAt(x, y);
+    for (i = 0; i < size(array2); i++) {
+        // Continue statements not allowed!
+        if (array2[i] !== me) array1[i] = "forward";
+    }
+
+    // Save shared data
+    sharedD = array1;
+    sharedE = array2;
+    // Terminator
+    move("forward");
+};
+
+const tryTeamMoveBack = function() {
+    // Load shared data
+    array1 = sharedD;
+    array2 = sharedE;
+
+    // Check if everyone can move back. This basically means no one's already
+    // got a move order, or against the back. So everyone must be 'active',
+    // 'clear', or 'edge_side'.
+    let i = 0;
+    for (i = 0; i < size(array1); i++) {
+        const val = array1[i] as Order;
+        if (val !== "clear" && val !== "active" && val !== "edge_side") {
+            // We can't move backward
+            return;
+        }
+    }
+
+    debugLog("Starting team backward move");
+    // Tell everyone to move backward.
+    const me = getEntityAt(x, y);
+    for (i = 0; i < size(array2); i++) {
+        if (array2[i] !== me) array1[i] = "backward";
+    }
+
+    // Save shared data
+    sharedD = array1;
+    sharedE = array2;
+    // Terminator
+    move("backward");
+};
+
+/**
+ * Reset the movement states of potentially dead bots, so they don't mess up the
+ * coordination algorithm.
+ */
+const resetTeamState = function() {
+    // Load shared data
+    array1 = sharedD;
+    array2 = sharedE;
+
+    let i = 0;
+    for (i = 0; i < size(array1); i++) {
+        const val = array1[i] as Order;
+        if (val == "active") array1[i] = "clear";
+    }
+
+    // Save shared data
+    sharedD = array1;
+    sharedE = array2;
+};
+
+const getOrder = function(): Order {
+    return getData() as Order;
+};
+
+const saveOrder = function(order: Order) {
+    saveData(order);
+};
+
+const isDirection = function(order: Order): order is Direction {
+    return (
+        order == "up" ||
+        order == "down" ||
+        order == "left" ||
+        order == "right" ||
+        order == "forward" ||
+        order == "backward"
+    );
+};
+
+const isStuck = function(order: Order): order is StuckSide {
+    return order == "edge_rear" || order == "edge_side";
+};
+
+const blindFireLasers = function() {
+    // TODO: can improve this based on X position.
+    if (percentChance(50)) fireLasers("forward");
+    if (y > floor(arenaHeight / 2)) fireLasers("up");
+    else fireLasers("down");
+};
diff --git a/LaserSquad/tsconfig.json b/LaserSquad/tsconfig.json
new file mode 100644
index 0000000..7581901
--- /dev/null
+++ b/LaserSquad/tsconfig.json
@@ -0,0 +1,7 @@
+{
+  "extends": "../tsconfig-botland",
+  "compilerOptions": {
+    "outFile": "../build/LaserSquad.js"
+  },
+  "files": ["LaserSquad.ts"]
+}
diff --git a/MissileKite/MissileKite.ts b/MissileKite/MissileKite.ts
index 1e539ee..2ccad28 100644
--- a/MissileKite/MissileKite.ts
+++ b/MissileKite/MissileKite.ts
@@ -17,7 +17,7 @@
  * Missiles 3, thrusters 2, shield 2 is possible to use against enemies with
  * high reflect and no thrusters (it saves 1 reflection).
  */
-const update = function() {
+update = function() {
     const TEAM_MIN_DIST = 2.5;
     const TEAM_MAX_DIST = 6.5;
 
diff --git a/SmartMelee/SmartMelee.ts b/SmartMelee/SmartMelee.ts
index 7eef6d5..60580a1 100644
--- a/SmartMelee/SmartMelee.ts
+++ b/SmartMelee/SmartMelee.ts
@@ -5,7 +5,7 @@
  * Note that when using thrusters with zapper, damage is dealt every time the
  * bot moves. So effective DPS can be twice as high (!!) as with normal zapper.
  */
-const update = function() {
+update = function() {
     // Equip when we see someone, not blindly
     const closestEnemyBot = findEntity(
         ENEMY,
diff --git a/Sneaktillery/Sneaktillery.ts b/Sneaktillery/Sneaktillery.ts
index 276ec1f..1f6e1b4 100644
--- a/Sneaktillery/Sneaktillery.ts
+++ b/Sneaktillery/Sneaktillery.ts
@@ -10,7 +10,7 @@
  * Sneaktillery will try to get into one of the positions that is 5 spaces away
  * from the CPU and just unload until it has exploded.
  */
-const update = function() {
+update = function() {
     // Whether we should use sensors (useful to shoot chips from afar)
     const USE_SENSORS = false;
     // Whether we should run if an enemy happens upon us and we have TP, to try
diff --git a/ZapKite/ZapKite.ts b/ZapKite/ZapKite.ts
index 82b644e..d045957 100644
--- a/ZapKite/ZapKite.ts
+++ b/ZapKite/ZapKite.ts
@@ -14,7 +14,7 @@
  * Turn 9: cloak (zap ends)
  * Rinse and repeat.
  */
-const update = function() {
+update = function() {
     // The first thing of chaos zapping is to never disrupt the cycle. Always
     // get the counter and increment it before doing anything else.
     const CYCLEN = 9;
diff --git a/lib/utils.ts b/lib/utils.ts
index 2983181..801d4a1 100644
--- a/lib/utils.ts
+++ b/lib/utils.ts
@@ -110,6 +110,14 @@ const tryFireMissiles = function() {
     }
 };
 
+const tryFireLasers = function() {
+    if (willLasersHit()) {
+        const gank = findEntity(ENEMY, BOT, SORT_BY_LIFE, SORT_ASCENDING);
+        if (willLasersHit(gank)) fireLasers(gank);
+        fireLasers();
+    }
+};
+
 const tryFireArtillery = function() {
     if (willArtilleryHit()) {
         const gank = findEntity(ENEMY, BOT, SORT_BY_LIFE, SORT_ASCENDING);
diff --git a/tsconfig.json b/tsconfig.json
index 5ed23af..47405b2 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -11,6 +11,9 @@
     {
       "path": "./ArtilleryMicro"
     },
+    {
+      "path": "./LaserSquad"
+    },
     {
       "path": "./MissileKite"
     },
diff --git a/types/bot-land/index.d.ts b/types/bot-land/index.d.ts
index 49362c7..a319fd4 100644
--- a/types/bot-land/index.d.ts
+++ b/types/bot-land/index.d.ts
@@ -37,7 +37,14 @@ declare type Direction =
     | "forward"
     | "backward";
 
-// Terminators
+/**
+ * Function called once each phase.
+ */
+declare let init: () => void;
+/**
+ * Function called every turn.
+ */
+declare let update: () => void;
 
 // Functions
 declare function debugLog(...stuff: any[]): void;
@@ -97,7 +104,7 @@ declare function melee(entity?: Entity): void;
 declare function willArtilleryHit(entity?: Entity): boolean;
 declare function fireArtillery(entity?: Entity): void;
 declare function willLasersHit(entity?: Entity): boolean;
-declare function fireLasers(entity?: Entity): void;
+declare function fireLasers(target?: Entity | Direction): void;
 declare function willMissilesHit(entity?: Entity): boolean;
 declare function fireMissiles(entity?: Entity): void;