diff --git a/screeps.com/testing-sim/creep_builds.js b/screeps.com/testing-sim/creep_builds.js
new file mode 100644
index 0000000..f096bf8
--- /dev/null
+++ b/screeps.com/testing-sim/creep_builds.js
@@ -0,0 +1,12 @@
+var creepBuilds = {
+
+	getHarvesterSmall: function() {
+		return [WORK, WORK, CARRY, MOVE];
+	},
+
+	getUpgraderSmall: function() {
+		return [WORK, CARRY, MOVE];
+	}
+};
+
+module.exports = creepBuilds;
diff --git a/screeps.com/testing-sim/main.js b/screeps.com/testing-sim/main.js
new file mode 100644
index 0000000..50df2f3
--- /dev/null
+++ b/screeps.com/testing-sim/main.js
@@ -0,0 +1,14 @@
+var settings = require("./settings");
+var misc = require("./misc");
+
+var creepManager = require("./manage_creeps");
+
+
+/*
+ * This file should probably only contain globally relevant methods and fields
+ */
+
+module.exports.loop = function () {
+	misc.clearMemory();
+	creepManager.run();
+}
diff --git a/screeps.com/testing-sim/manage_creeps.js b/screeps.com/testing-sim/manage_creeps.js
new file mode 100644
index 0000000..dceee7c
--- /dev/null
+++ b/screeps.com/testing-sim/manage_creeps.js
@@ -0,0 +1,43 @@
+/*
+ * 
+ */
+
+var creepBuilds = require("./creep_builds");
+var settings = require("./settings");
+var misc = require("./misc");
+
+
+var spawnCreeps = settings.getSpawnCreeps();
+var creepGoalAmount = settings.getCreepGoalAmount();
+
+var creepManager = {
+
+	run: function() {
+		if (spawnCreeps) {
+			for (role in creepGoalAmount) {
+				roleCreepsAmount = _.filter(Game.creeps, (creep) => creep.memory.role == role);
+				if (roleCreepsAmount < creepGoalAmount[role]) {
+					spawnCreep(role, roleCreepsAmount);
+				}
+			}
+		}
+	}
+};
+
+module.exports = creepManager;
+
+
+
+
+function spawnCreep(role, existing) {
+	let name = role + "_Spheal_" + existing;
+
+	if (!Game.spawns.Spawn1.spawning) {
+		misc.displayMessage("Spawn", Game.spawns.Spawn1, "Spawning next: " + name);
+		}
+	else {
+		misc.displayMessage("Spawn", Game.spawns.Spawn1, "Spawning Creep");
+		}
+
+	Game.spawns.Spawn1.spawnCreep(creepBuilds[buildType], newCreepName, { memory: { role: buildType } });
+}
diff --git a/screeps.com/testing-sim/misc.js b/screeps.com/testing-sim/misc.js
new file mode 100644
index 0000000..b03f5a0
--- /dev/null
+++ b/screeps.com/testing-sim/misc.js
@@ -0,0 +1,14 @@
+var settings = {
+
+	clearMemory: function() {
+		for (var creep in Memory.creeps) {
+			if (!Game.creeps[creep])
+			{
+				delete Memory.creeps[creep];
+				console.log("Deleating non-existing creep memory: ", creep);
+			}
+		}
+	},
+};
+
+module.exports = settings;
diff --git a/screeps.com/testing-sim/roles_builder.js b/screeps.com/testing-sim/roles_builder.js
new file mode 100644
index 0000000..4ba342f
--- /dev/null
+++ b/screeps.com/testing-sim/roles_builder.js
@@ -0,0 +1,41 @@
+/*
+ * Module code goes here. Use 'module.exports' to export things:
+ * module.exports.thing = 'a thing';
+ *
+ * You can import it from another modules like this:
+ * var mod = require('role.builder');
+ * mod.thing == 'a thing'; // true
+ */
+
+var roleBuilder = {
+
+    /** @param {Creep} creep **/
+    run: function(creep) {
+
+	    if(creep.memory.building && creep.store[RESOURCE_ENERGY] == 0) {
+            creep.memory.building = false;
+            creep.say('🔄 harvest');
+	    }
+	    if(!creep.memory.building && creep.store.getFreeCapacity() == 0) {
+	        creep.memory.building = true;
+	        creep.say('🚧 build');
+	    }
+
+	    if(creep.memory.building) {
+	        var targets = creep.room.find(FIND_CONSTRUCTION_SITES);
+            if(targets.length) {
+                if(creep.build(targets[0]) == ERR_NOT_IN_RANGE) {
+                    creep.moveTo(targets[0], {visualizePathStyle: {stroke: '#ffffff'}});
+                }
+            }
+	    }
+	    else {
+	        var sources = creep.room.find(FIND_SOURCES);
+            if(creep.harvest(sources[0]) == ERR_NOT_IN_RANGE) {
+                creep.moveTo(sources[0], {visualizePathStyle: {stroke: '#ffaa00'}});
+            }
+	    }
+	}
+};
+
+module.exports = roleBuilder;
\ No newline at end of file
diff --git a/screeps.com/testing-sim/roles_harvester.js b/screeps.com/testing-sim/roles_harvester.js
new file mode 100644
index 0000000..95e28a6
--- /dev/null
+++ b/screeps.com/testing-sim/roles_harvester.js
@@ -0,0 +1,27 @@
+var roleHarvester = {
+
+    /** @param {Creep} creep **/
+    run: function(creep) {
+	    if(creep.store.getFreeCapacity() > 0) {
+            var sources = creep.room.find(FIND_SOURCES);
+            if(creep.harvest(sources[0]) == ERR_NOT_IN_RANGE) {
+                creep.moveTo(sources[0], {visualizePathStyle: {stroke: '#ffaa00'}});
+            }
+        }
+        else {
+            var targets = creep.room.find(FIND_STRUCTURES, {
+                    filter: (structure) => {
+                        return (structure.structureType == STRUCTURE_EXTENSION || structure.structureType == STRUCTURE_SPAWN) &&
+                            structure.store.getFreeCapacity(RESOURCE_ENERGY) > 0;
+                    }
+            });
+            if(targets.length > 0) {
+                if(creep.transfer(targets[0], RESOURCE_ENERGY) == ERR_NOT_IN_RANGE) {
+                    creep.moveTo(targets[0], {visualizePathStyle: {stroke: '#ffffff'}});
+                }
+            }
+        }
+	}
+};
+
+module.exports = roleHarvester;
\ No newline at end of file
diff --git a/screeps.com/testing-sim/settings.js b/screeps.com/testing-sim/settings.js
new file mode 100644
index 0000000..df97caa
--- /dev/null
+++ b/screeps.com/testing-sim/settings.js
@@ -0,0 +1,17 @@
+var settings = {
+
+	getCreepGoalAmount: function() {
+		var getCreepAmountGoalDict = {
+			harvester: 1,
+			upgrader: 1,
+			builder: 1
+		}
+		return getCreepAmountGoalDict;
+		},
+
+	getSpawnCreeps: function() {
+		return true
+	}
+};
+
+module.exports = settings;