Tweak wand colors

[ehamner]

Currently the wand LED colors are:
too quickly (red), too slowly (white), or just right (green). If the student continues moving the wand at the right speed, they can press the button on the wand to change the color of the LED.

Can we update the colors that the LED changes to when the button is pressed so they are clearly not red or white? I think it's the yellow that looks so similar to the white. Maybe some of the others too. I'd prefer them to be more distinct even if there are fewer. :)