Version 1.4: Fixed inverted raster on 12/24h
Version 1.3: Added small border
Version 1.2: Changed growing direction of 5 min blocks to increase readability for 15, 30 and 45 minutes.
Version 1.1: 12 Blocks for hours, 12 Blocks for every 5 minutes. Removed unnecessary calls. Show grid for 12:00 + 24:00.
Version 1.0: 12 Blocks for hours, 6 Blocks for every 10 minutes.