diff --git a/baumgen.js b/baumgen.js
index c9a16cf..0475e78 100644
--- a/baumgen.js
+++ b/baumgen.js
@@ -2,26 +2,26 @@
 paper.install(window);
 
 
-function gen_tree(pos) {
+function gen_tree(pos, maxheight) {
     var baum = new Branch();
 
-    baum.length = (20 + Math.random() * 20);
+    baum.length = 0.15 * maxheight + 0.15 * maxheight * Math.random();
 
     var shapernd = Math.random() * 3;
     if(shapernd < 1) {
         baum.crown = new KiteCrown(
-            70 + Math.random() * 30,
+            0.49 * maxheight + 0.21 * maxheight * Math.random(),
             0.4 + Math.random() * 0.2,
             {bisect: 0.2 + Math.random() * 0.2},
         );
     } else if(shapernd < 2) {
         baum.crown = new TriangleCrown(
-            70 + Math.random() * 30,
+            0.49 * maxheight + 0.21 * maxheight * Math.random(),
             0.4 + Math.random() * 0.2,
         );
     } else {
         baum.crown = new EllipseCrown(
-            70 + Math.random() * 30,
+            0.49 * maxheight + 0.21 * maxheight * Math.random(),
             0.4 + Math.random() * 0.2,
             {bisect: 0.1 + Math.random() * 0.4},
         );
@@ -80,6 +80,10 @@ class Crown {
     collides(other) {
         return this._path.intersects(other._path);
     }
+
+    get bounds() {
+        return this._path.bounds;
+    }
 }
 
 
@@ -220,6 +224,24 @@ class Branch {
     collides_crown(other) {
         return this.crown.collides(other.crown);
     }
+
+    get bounds() {
+        var b = this._branch.bounds;
+        b = b.unite(this.crown.bounds);
+        if(typeof this.forks !== "undefined") {
+            for (let fork of this.forks) {
+                b = b.unite(fork.branch.bounds);
+                /*
+                var r = new Path.Rectangle({
+                    point: fork.branch.bounds.point,
+                    size: fork.branch.bounds.size,
+                    strokeWidth: 1,
+                    strokeColor: 'green'});
+                */
+            }
+        }
+        return b;
+    }
 }
 
 
@@ -227,11 +249,38 @@ function draw() {
     var canvas = document.getElementById('canvas');
     paper.setup(canvas);
 
-    //var br = new Branch(baum);
-
-    for(var x=0; x<10; x++) {
-        for(var y=0; y<5; y++) {
-            var br = new Branch(gen_tree(new Point(50 + x*80, 150 + y*160)));
+    var width = 148 * 5;
+    var height = 105 * 5;
+    var rows = 3;
+    var rowspace = 20;
+    var inspace = 30;
+    var outspace = 10;
+
+    var maxh = (height - (rows-1)*rowspace - 2*outspace - 2*inspace) / rows;
+
+    var outline = new Path.Rectangle({
+        point: new Point(outspace, outspace),
+        size: new Size(width - 2*outspace, height - 2*outspace),
+        strokeWidth: 2,
+        strokeColor: 'black'
+    });
+
+    for(var row=0; row<rows; row++) {
+        var y = outspace + inspace + maxh * (row + 1) + rowspace * row;
+        var x = outspace + inspace + 20; // TODO approx width
+        var prev;
+        while(x < width - outspace - inspace - 60) { // TODO approx width
+            var yy = y + Math.random() * 40 - 20;
+            x += Math.random() * 10; // TODO approx width
+            var t = gen_tree(new Point(x, yy), maxh);
+            if(typeof prev !== 'undefined') {
+                while(prev.bounds.intersects(t.bounds)) {
+                    x += 15;
+                    t.draw(new Point(x, y));
+                    console.log('intersects');
+                }
+            }
+            prev = t;
         }
     }
 }