diff --git a/screeps.com/testing-sim/creep_builds.js b/screeps.com/testing-sim/creep_builds.js
index f2ea408..2926993 100644
--- a/screeps.com/testing-sim/creep_builds.js
+++ b/screeps.com/testing-sim/creep_builds.js
@@ -13,6 +13,10 @@ var creepBuilds = {
 
 		return buildsDict;
 	},
+
+	getRoleObject: function(roleStr) {
+		return require("./roles_" + roleStr);
+	}
 };
 
 module.exports = creepBuilds;
diff --git a/screeps.com/testing-sim/manage_creeps.js b/screeps.com/testing-sim/manage_creeps.js
index e8a1094..8d7705a 100644
--- a/screeps.com/testing-sim/manage_creeps.js
+++ b/screeps.com/testing-sim/manage_creeps.js
@@ -13,6 +13,7 @@ var creepGoalAmount = settings.getCreepGoalAmount();
 var creepManager = {
 
 	run: function() {
+		//spawn desired creeps
 		if (spawnCreeps) {
 			for (let role in creepGoalAmount) {
 				let roleCreepsAmount = (_.filter(Game.creeps, (creep) => creep.memory.role == role)).length;
@@ -21,6 +22,14 @@ var creepManager = {
 				}
 			}
 		}
+
+		//run creeps by role
+		for (let creep in Game.creeps) {
+			let creepName = Game.creeps[creep];
+			let role = creepName.memory.role;
+			let roleObject = creepBuilds.getRoleObject(role);
+			roleObject.run(creepName);
+		}
 	}
 };
 
diff --git a/screeps.com/testing-sim/roles_builder.js b/screeps.com/testing-sim/roles_builder.js
index 4ba342f..4c959e9 100644
--- a/screeps.com/testing-sim/roles_builder.js
+++ b/screeps.com/testing-sim/roles_builder.js
@@ -7,7 +7,7 @@
  * mod.thing == 'a thing'; // true
  */
 
-var roleBuilder = {
+var creep = {
 
     /** @param {Creep} creep **/
     run: function(creep) {
@@ -38,4 +38,4 @@ var roleBuilder = {
 	}
 };
 
-module.exports = roleBuilder;
\ No newline at end of file
+module.exports = creep;
diff --git a/screeps.com/testing-sim/roles_harvester.js b/screeps.com/testing-sim/roles_harvester.js
index 95e28a6..d3e6d92 100644
--- a/screeps.com/testing-sim/roles_harvester.js
+++ b/screeps.com/testing-sim/roles_harvester.js
@@ -1,11 +1,14 @@
-var roleHarvester = {
+var settings = require("./settings");
+var colorScheme = settings.getColorScheme();
+
+var creep = {
 
     /** @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'}});
+                creep.moveTo(sources[0], {visualizePathStyle: {stroke: colorScheme["primary"]}});
             }
         }
         else {
@@ -24,4 +27,4 @@ var roleHarvester = {
 	}
 };
 
-module.exports = roleHarvester;
\ No newline at end of file
+module.exports = creep;
diff --git a/screeps.com/testing-sim/settings.js b/screeps.com/testing-sim/settings.js
index 591f986..f8ddfd7 100644
--- a/screeps.com/testing-sim/settings.js
+++ b/screeps.com/testing-sim/settings.js
@@ -11,7 +11,16 @@ var settings = {
 
 	getSpawnCreeps: function() {
 		return true
-	}
+	},
+
+	getColorScheme: function() {
+		let colors = {
+			primary: "#7b9ce6",
+			secondary: "f6e6bd",
+			tertiary: "cc2222",
+		};
+		return colors;
+	},
 };
 
 module.exports = settings;