Slide the slider and pick your colour. Once it asks you Done? either say yes (or Yes) or anything else (which means no). If it pops up, do not change colour or it will stop. If you say yes then it will start the pattern. If you say anything else then it will ask you again in 3 seconds
Press green flag to restart. There is only a certain number of pattern colours you can make. Want it instantly? Go to turbo mode.