diff --git a/Agent.cs b/Agent.cs
index cfcb629..0f6e6ea 100644
--- a/Agent.cs
+++ b/Agent.cs
@@ -1,4 +1,6 @@
 
+using System.Collections.Generic;
+
 using UnityEngine;
 
 public class Agent {
@@ -7,9 +9,11 @@ public class Agent {
 
     public int id;
 
-    public int sugar;
-    public int vision;
-    public int metabolism;
+    public bool isAlive { get; private set; } = true;
+
+    public int sugar { get; private set; }
+    public readonly int vision;
+    public readonly int metabolism;
 
     public Location location;
 
@@ -23,8 +27,46 @@ public Agent () {
         InitGameObject();
     }
 
+    public void Step () {
+        this.Move();
+        this.Harvest();
+        this.Eat();
+    }
+
     public void Render () {
-        gameObject.transform.localPosition = new Vector3(Utils.RandomInt(50), 0, Utils.RandomInt(50));
+        gameObject.transform.localPosition = new Vector3(this.location.y, 0, this.location.x);
+    }
+
+    private void Move () {
+        Location next = this.location;
+
+        foreach ( List<Location> locationsInDirection in Utils.Shuffle(this.location.GetAllLocationsInSight(this.vision)) ) {
+            foreach ( Location potential in locationsInDirection ) {
+                if ( potential.agent == null && potential.sugar > next.sugar ) {
+                    next = potential;
+                }
+            }
+        }
+
+        this.location.agent = null;
+        this.location = next;
+        this.location.agent = this;
+    }
+
+    private void Harvest () {
+        this.sugar += this.location.Harvest();
+    }
+
+    private void Eat () {
+        sugar -= metabolism;
+        if ( sugar < 0 ) {
+            this.Die();
+        }
+    }
+
+    private void Die () {
+        Object.Destroy(gameObject);
+        isAlive = false;
     }
 
     private void InitGameObject () {
@@ -39,4 +81,5 @@ private void InitGameObject () {
         renderer.shadowCastingMode = UnityEngine.Rendering.ShadowCastingMode.Off;
         renderer.sharedMaterial = Materials.DEFAULT;
     }
+
 }
diff --git a/Environment.cs b/Environment.cs
index 442f2dd..f72b836 100644
--- a/Environment.cs
+++ b/Environment.cs
@@ -12,6 +12,14 @@ public Environment () {
         InitGameObject();
     }
 
+    public void Step () {
+        for ( int y = 0 ; y < locations.GetLength(0) ; y++ ) {
+            for ( int x = 0 ; x < locations.GetLength(1) ; x++ ) {
+                locations[y, x].Step();
+            }
+        }
+    }
+
     public void Render () {
         for ( int y = 0 ; y < locations.GetLength(0) ; y++ ) {
             for ( int x = 0 ; x < locations.GetLength(1) ; x++ ) {
@@ -40,6 +48,7 @@ private void InitLocations () {
                 locations[y, x] = new Location(x, y, Utils.SUGAR_CAPACITIES[y, x]);
             }
         }
+
         for ( int y = 0 ; y < height ; y++ ) {
             for ( int x = 0 ; x < width ; x++ ) {
                 int up = y == 0 ? height - 1 : y - 1;
diff --git a/Location.cs b/Location.cs
index b25e0fc..1d61f67 100644
--- a/Location.cs
+++ b/Location.cs
@@ -1,4 +1,6 @@
 
+using System.Collections.Generic;
+
 using UnityEngine;
 
 public class Location {
@@ -40,10 +42,69 @@ Location west
         this.west = west;
     }
 
+    public void Step () {
+        this.sugar = Mathf.Min(this.sugar + Simulation.Parameters.SUGAR_GROWTH_RATE, capacity);
+    }
+
     public void Render () {
         gameObject.transform.localScale = Mathf.Sqrt(sugar) * Vector3.one / 25;
     }
 
+    public int Harvest () {
+        int sugar = this.sugar;
+        this.sugar = 0;
+        return sugar;
+    }
+
+    public List<List<Location>> GetAllLocationsInSight (int distance) {
+        List<List<Location>> allLocations = new List<List<Location>>();
+        allLocations.Add(GetNorthernLocations(distance));
+        allLocations.Add(GetSouthernLocations(distance));
+        allLocations.Add(GetEasternLocations(distance));
+        allLocations.Add(GetWesternLocations(distance));
+        return allLocations;
+    }
+
+    private List<Location> GetNorthernLocations (int distance) {
+        List<Location> locations = new List<Location>();
+        Location that = this;
+        do {
+            locations.Add(that.north);
+            that = that.north;
+        } while ( --distance > 0 );
+        return locations;
+    }
+
+    private List<Location> GetSouthernLocations (int distance) {
+        List<Location> locations = new List<Location>();
+        Location that = this;
+        do {
+            locations.Add(that.south);
+            that = that.south;
+        } while ( --distance > 0 );
+        return locations;
+    }
+
+    private List<Location> GetEasternLocations (int distance) {
+        List<Location> locations = new List<Location>();
+        Location that = this;
+        do {
+            locations.Add(that.east);
+            that = that.east;
+        } while ( --distance > 0 );
+        return locations;
+    }
+
+    private List<Location> GetWesternLocations (int distance) {
+        List<Location> locations = new List<Location>();
+        Location that = this;
+        do {
+            locations.Add(that.west);
+            that = that.west;
+        } while ( --distance > 0 );
+        return locations;
+    }
+
     private void InitGameObject () {
         gameObject = GameObject.CreatePrimitive(PrimitiveType.Plane);
         gameObject.name = "Sugar" + x + "," + y;
diff --git a/Main.cs b/Main.cs
index bff919a..69f857b 100644
--- a/Main.cs
+++ b/Main.cs
@@ -3,10 +3,20 @@
 
 public class Main : MonoBehaviour {
 
-    void Start()
-    {
+    private float elaspedTime = 0;
+
+    void Awake () {
         Simulation.Init();
         Simulation.Render();
     }
 
+    void Update () {
+        this.elaspedTime += Time.deltaTime;
+        float secondsPerStep = 1.0f / Simulation.Parameters.STEPS_PER_SECOND;
+        for ( int i = (int) ( this.elaspedTime * secondsPerStep ) ; i > 0 ; i-- ) {
+            Simulation.Step();
+            Simulation.Render();
+            this.elaspedTime -= secondsPerStep;
+        }
+    }
 }
diff --git a/Simulation.cs b/Simulation.cs
index 07288b4..0e17ed7 100644
--- a/Simulation.cs
+++ b/Simulation.cs
@@ -1,10 +1,14 @@
 
 using System.Collections.Generic;
 
+using UnityEngine;
+
 public class Simulation {
 
     public static class Parameters {
+        public static float STEPS_PER_SECOND = 4;
         public static int NUMBER_OF_AGENTS = 400;
+        public static int SUGAR_GROWTH_RATE = 1;
         public static class Endowment {
             public static int MIN = 20;
             public static int MAX = 40;
@@ -19,6 +23,8 @@ public static class Metabolism {
         }
     }
 
+    public static int STEPS { get; private set; } = 0;
+
     public static Environment environment = new Environment();
     public static List<Agent> agents = new List<Agent>();
 
@@ -32,10 +38,23 @@ public static void Init () {
         }
     }
 
+    public static void Step () {
+        foreach ( Agent agent in Utils.Shuffle(agents) ) {
+            if ( agent.isAlive ) {
+                agent.Step();
+            }
+        }
+        environment.Step();
+        STEPS++;
+    }
+
     public static void Render () {
         environment.Render();
         foreach ( Agent agent in agents ) {
-            agent.Render();
+            if ( agent.isAlive ) {
+                agent.Render();
+            }
         }
     }
+
 }