new, simpler noise field example

examples.py/Basics/Math/simple_noisefield.py

@@ -0,0 +1,14 @@
+"""
+  simple_noisefield.py - demonstrate Perlin noise
+  Jonathan Feinberg
+"""
+
+def setup():
+    size(100, 100)
+
+def draw():
+    t = .0005 * millis()
+    for y in range(height):
+        for x in range(width):
+            blue = noise(t + .1*x, t + .05*y, .2*t)
+            set(x, y, color(0, 0, 255 * blue))