Started on make_wallpaper function. Generalize and add a stepper function

.gitignore

@@ -1,2 +1,3 @@
 .dir-locals.el
 __pycache__
+*.png

prim_wallpaper/make_wallpaper.py

@@ -0,0 +1,15 @@
+import itertools
+
+from PIL import Image
+
+
+def make_wallpaper(a, b, c):
+    out = Image.new("RGB", (1 << 12, 1 << 12))
+    prim_a = (pow(a, 257, i) - 1 for i in range(1, 256 + 1))
+    prim_b = (pow(b, 257, i) - 1 for i in range(1, 256 + 1))
+    prim_c = (pow(c, 257, i) - 1 for i in range(1, 256 + 1))
+    rgb_values = itertools.product(prim_a, prim_b, prim_c)
+    for i, rgb in enumerate(rgb_values):
+        y, x = divmod(i, 1 << 12)
+        out.putpixel((x, y), rgb)
+    return out