Added a version to make rainbow stripes, hard coded the longway. 

https://github.com/carlynorama/2017superconbadge/blob/master/rainbowbadge.c

right now, super lazy hardcoded way. 

plotblock(0, 0, dispwidth, 20, rgbto16(255,0,0));
plotblock(0, 20, dispwidth, 20, rgbto16(255,165,0));
plotblock(0, 40, dispwidth, 20, rgbto16(255,255,0));
plotblock(0, 60, dispwidth, 20, rgbto16(0,128,0));
plotblock(0, 80, dispwidth, 20, rgbto16(0,0,255));
plotblock(0, 100, dispwidth, 20, rgbto16(75,0,130));
plotblock(0, 120, dispwidth, 20, rgbto16(238,130,238));