diff --git a/Main.cs b/Main.cs
index 82c81ce..033ae29 100644
--- a/Main.cs
+++ b/Main.cs
@@ -1,11 +1,15 @@
+using System.Collections.Generic;
 using Godot;
 
 public class Main : Node2D
 {
+    private readonly List<ParticleType> _particleTypes = new List<ParticleType>();
+
     public override void _Ready()
     {
         GD.Randomize();
-        InitializeParticles();
+        InitializeParticleTypes(5);
+        InitializeParticles(50);
     }
 
     public override void _Process(float delta)
@@ -14,15 +18,33 @@ public class Main : Node2D
         if (Input.IsActionJustPressed("reset")) GetTree().ReloadCurrentScene();
     }
 
-    private void InitializeParticles()
+    private void InitializeParticleTypes(int nTypes)
     {
+        for (var i = 0; i < nTypes; i++)
+        {
+            var type = new ParticleType
+            {
+                Hue = (float) GD.RandRange(0, 1)
+            };
+            _particleTypes.Add(type);
+        }
+    }
+
+    private void InitializeParticles(int nParticles)
+    {
+        var typeCount = 0;
         var particleScene = GD.Load<PackedScene>("res://Particle.tscn");
-        for (var i = 0; i < 50; i++)
+        for (var i = 0; i < nParticles; i++)
         {
             var particle = particleScene.Instance<Particle>();
             GetNode<Node2D>("Particles").AddChild(particle);
             particle.Position = GetRandomParticlePosition();
-            particle.Hue = (float) GD.RandRange(0, 1);
+            particle.Type = _particleTypes[typeCount];
+            
+            if (typeCount < _particleTypes.Count - 1)
+                typeCount++;
+            else
+                typeCount = 0;
         }
     }
 
diff --git a/Particle.cs b/Particle.cs
index df553fe..e111f38 100644
--- a/Particle.cs
+++ b/Particle.cs
@@ -2,16 +2,16 @@ using Godot;
 
 public class Particle : Node2D
 {
-    private float _spriteHue;
     private Sprite _spriteNode;
+    private ParticleType _type;
 
-    public float Hue
+    public ParticleType Type
     {
-        get => _spriteHue;
+        get => _type;
         set
         {
-            _spriteHue = Mathf.Clamp(value, 0, 1);
-            _spriteNode.Modulate = Color.FromHsv(_spriteHue, 1, 1);
+            _type = value;
+            _spriteNode.Modulate = Color.FromHsv(_type.Hue, 1, 1);
         }
     }
 
diff --git a/ParticleType.cs b/ParticleType.cs
new file mode 100644
index 0000000..b18cdfb
--- /dev/null
+++ b/ParticleType.cs
@@ -0,0 +1,38 @@
+using System.Collections.Generic;
+using Godot;
+
+public struct ParticleRelationshipProps
+{
+    public ParticleRelationshipProps(float minRadius, float maxRadius, float force)
+    {
+        MinRadius = minRadius;
+        MaxRadius = maxRadius;
+        Force = force;
+    }
+
+    public float MinRadius { get; }
+    public float MaxRadius { get; }
+    public float Force { get; }
+}
+
+public class ParticleType
+{
+    private float _hue;
+
+    private readonly Dictionary<ParticleType, ParticleRelationshipProps> _particleRelationships =
+        new Dictionary<ParticleType, ParticleRelationshipProps>();
+
+    public float Hue
+    {
+        get => _hue;
+        set => _hue = Mathf.Clamp(value, 0, 1);
+    }
+
+    public void AddRelationship(ParticleType type, float minRadius, float maxRadius, float force)
+    {
+        if (_particleRelationships.ContainsKey(type))
+            return;
+        var props = new ParticleRelationshipProps(minRadius, maxRadius, force);
+        _particleRelationships[type] = props;
+    }
+}
\ No newline at end of file
diff --git a/Particles.csproj b/Particles.csproj
index db88a8d..ceaf2bb 100644
--- a/Particles.csproj
+++ b/Particles.csproj
@@ -1,5 +1,5 @@
 <Project Sdk="Godot.NET.Sdk/3.3.0">
-  <PropertyGroup>
-    <TargetFramework>net472</TargetFramework>
-  </PropertyGroup>
+    <PropertyGroup>
+        <TargetFramework>net472</TargetFramework>
+    </PropertyGroup>
 </Project>
\ No newline at end of file
diff --git a/Particles.sln.DotSettings.user b/Particles.sln.DotSettings.user
new file mode 100644
index 0000000..f591ba1
--- /dev/null
+++ b/Particles.sln.DotSettings.user
@@ -0,0 +1,2 @@
+<wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:String x:Key="/Default/CodeInspection/PencilsConfiguration/ActualSeverity/@EntryValue">INFO</s:String></wpf:ResourceDictionary>
\ No newline at end of file