make the generator script output two columns

gen.py

@@ -100,16 +100,27 @@ class Block:
 blocks = [ Block(file) for file in files ]
 height = sum(b.height() for b in blocks)
 
-result = PIL.Image.new("RGB", (112, height))
+left_height = 0
+for b in blocks:
+    left_height += b.height()
+    if 2 * left_height >= height: break
+
+result = PIL.Image.new("RGB", (2 * 112 + 8, left_height), color=WHITE)
 
+x = 0
 y = 0
+
 for b in blocks:
     header = b.header()
-    result.paste(header, (0, y))
+    result.paste(header, (x, y))
     y += header.height
 
     body = b.body()
-    result.paste(body, (0, y))
+    result.paste(body, (x, y))
     y += body.height
 
+    if y >= left_height:
+        y = 0
+        x += 112 + 8
+
 result.save("uf5x7.png")