Problem
1. Draw horizontal and vertical lines on a picture with 10 pixels between the lines.
2. Draw horizontal and vertical lines on a picture where the gap between the lines increases linearly. Start at 10, then 12, then 14.
3. Draw multiple diagonal lines across a picture from top left to bottom right leaving a space between them using Bresenham's line algorithm.
4. Draw diagonal lines on a picture from top right to bottom left using add Line.