And use only three colours, Fuchsia red, turquoise and lemon yellow. To make the rainbow swirl shirt, imagine that your "pie" is an actual pie chart! Working from the centre of the shirt and holding the bottle low over the shirt, dye one third of the shirt lemon yellow. Do not wave the bottle around as you will make a mess! Dye the second third of the shirt fuchsia red and the final third turquoise. Do not leave any white spaces showing th "white" If you overlap the colours at the edges of each section you will get the other rainbow colours.