adding nature of code examples

java/examples/Books/Nature of Code/introduction/Figure_I_6_RandomGraph/Figure_I_6_RandomGraph.pde

@@ -0,0 +1,22 @@
+// The Nature of Code
+// http://www.shiffman.net/
+
+void setup() {
+  size(400,200);
+  smooth();
+}
+
+
+void draw() {
+  background(255);
+  noFill();
+  stroke(0);
+  strokeWeight(2);
+  beginShape();
+  for (int i = 0; i < width; i++) {
+    float y = random(height);
+    vertex(i,y);
+  }
+  endShape();
+  noLoop();
+}