diff --git a/src/Actions/Action.ts b/src/Actions/Action.ts
index 2007405..3774858 100644
--- a/src/Actions/Action.ts
+++ b/src/Actions/Action.ts
@@ -51,7 +51,7 @@ export const createAction = (name: string, action: (creep: Creep) => Action): Ac
         if ((creep.memory.state ?? 0) > state) {
             return Success(creep, state);
         }
-        console.log(`[${creep.name}] Running action ${name}`)
+        //console.log(`[${creep.name}] Running action ${name}`)
         return action(creep)(creep, state);
     }
 }
diff --git a/src/Actions/buildConstructionSite.ts b/src/Actions/buildConstructionSite.ts
new file mode 100644
index 0000000..db3f6c9
--- /dev/null
+++ b/src/Actions/buildConstructionSite.ts
@@ -0,0 +1,23 @@
+import { createAction, Fail, InProgress, Success } from "./Action";
+import { moveTo } from "./moveTo";
+
+export const buildConstructionSite = () => createAction('buildConstructionSite', (creep: Creep) => {
+    const cs = creep.pos.findClosestByRange(FIND_CONSTRUCTION_SITES);
+    if (!cs) {
+        return Fail;
+    }
+    switch (creep.build(cs)) {
+        case OK: {
+            return InProgress;
+        }
+        case ERR_NOT_ENOUGH_RESOURCES: {
+            return Success;
+        }
+        case ERR_NOT_IN_RANGE: {
+            return moveTo(cs);
+        }
+        default: {
+            return Fail;
+        }
+    }
+})
\ No newline at end of file
diff --git a/src/RoomPlanner/Blueprints/Extensions.ts b/src/RoomPlanner/Blueprints/Extensions.ts
new file mode 100644
index 0000000..025a295
--- /dev/null
+++ b/src/RoomPlanner/Blueprints/Extensions.ts
@@ -0,0 +1,16 @@
+const extentionsAvailable = (roomlevel: number) => {
+    return roomlevel > 2 ? roomlevel * 10 - 20 : (roomlevel - 1) * 5;
+}
+
+export const buildExtentions = (room: Room) => {
+    const spawns = room.find(FIND_MY_SPAWNS);
+    if (spawns.length < 1) return;
+    const spawn = spawns[0];
+    const exts = extentionsAvailable(room.controller?.level ?? 0)
+    for (let x = -Math.floor(Math.sqrt(exts) / 2); x < Math.sqrt(exts) / 2; x++) {
+        for (let y = -Math.floor(Math.sqrt(exts) / 2); y < Math.sqrt(exts) / 2; y++) {
+            room.visual.circle(spawn.pos.x + x * 2, spawn.pos.y + y * 2);
+            room.createConstructionSite(spawn.pos.x + x * 2, spawn.pos.y + y * 2, STRUCTURE_EXTENSION);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/RoomPlanner/Blueprints/Roads.ts b/src/RoomPlanner/Blueprints/Roads.ts
index 2ff0cac..3350459 100644
--- a/src/RoomPlanner/Blueprints/Roads.ts
+++ b/src/RoomPlanner/Blueprints/Roads.ts
@@ -2,9 +2,10 @@ export const buildRoads = (room: Room) => {
     if ((room.controller?.level ?? 0) < 2) {
         return;
     }
-    const sources = room.find(FIND_SOURCES);
+    const sources: _HasRoomPosition[] = room.find(FIND_SOURCES);
+    const sourcesAndSpawns = sources.concat(room.find(FIND_MY_SPAWNS));
     room.visual.clear();
-    for (const source of sources) {
+    for (const source of sourcesAndSpawns) {
         for (const source2 of sources) {
             const path = source.pos.findPathTo(source2, {
                 ignoreCreeps: true,
diff --git a/src/index.ts b/src/index.ts
index a7a1e11..4c77da9 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,7 +1,9 @@
 import { runAction } from "./Actions/Action";
+import { buildConstructionSite } from "./Actions/buildConstructionSite";
 import { harvestFromClosestActiveSource } from "./Actions/harvest";
 import { transferEnergy } from "./Actions/transferEnergy";
 import { upgradeController } from "./Actions/upgradeController";
+import { buildExtentions } from "./RoomPlanner/Blueprints/Extensions";
 import { buildRoads } from "./RoomPlanner/Blueprints/Roads";
 
 export function loop() {
@@ -10,21 +12,31 @@ export function loop() {
     if (!controller) {
         return;
     }
-    spawn.spawnCreep([WORK, CARRY, CARRY, MOVE], 'w6');
-    spawn.spawnCreep([WORK, CARRY, CARRY, MOVE], 'w5');
-    spawn.spawnCreep([WORK, CARRY, CARRY, MOVE], 'w4');
-    spawn.spawnCreep([WORK, CARRY, CARRY, MOVE], 'w3');
-    spawn.spawnCreep([WORK, CARRY, CARRY, MOVE], 'w2');
-    spawn.spawnCreep([WORK, CARRY, CARRY, MOVE], 'w1');
+    spawn.spawnCreep([WORK, CARRY, CARRY, MOVE], 'builder6');
+    spawn.spawnCreep([WORK, CARRY, CARRY, MOVE], 'uprader5');
+    spawn.spawnCreep([WORK, CARRY, CARRY, MOVE], 'builder4');
+    spawn.spawnCreep([WORK, CARRY, CARRY, MOVE], 'builder3');
+    spawn.spawnCreep([WORK, CARRY, CARRY, MOVE], 'upgrader2');
+    spawn.spawnCreep([WORK, CARRY, CARRY, MOVE], 'upgrader1');
     for (const creep of Object.values(Game.creeps)) {
-        runAction(creep, harvestFromClosestActiveSource())
+        if (creep.name.startsWith('u') || creep.name.startsWith('w')) {
+            runAction(creep, harvestFromClosestActiveSource())
             .andThen(transferEnergy(spawn))
             .or(upgradeController(controller))
             .repeat()
+        } else if (creep.name.startsWith('b')) {
+            runAction(creep, harvestFromClosestActiveSource())
+            .andThen(buildConstructionSite())
+            .or(upgradeController(controller))
+            .repeat()
+        }
     }
     if (Game.time % 100 === 0) {
         buildRoads(spawn.room);
     }
+    if (Game.time % 100 === 50) {
+        buildExtentions(spawn.room)
+    }
     if (Game.cpu.bucket === 10000) {
         Game.cpu.generatePixel();
     }