Shift key, flag, for turbo. Use full screen. Red and green lines repeatedly stamps and turns by the "degrees" you set. Yellow should result, but the "moire" starlike patterns should be red and green. What degree turn makes interesting patterns?
When mixing light (as in a computer screen, "additive" mixing), red and green make yellow. The thin lines, spaced a bit apart, create "moire" patterns. The stars should be green and red against a yellow background. Combining the moire with red and green lines makes the yellow, green and red moire star patterns.
