Press the green flag to "reset"(delete the different types of clones at the same time). Press space for next mouse trail. Press up arrow to have 2 different types of patterns at the same time. Press a key to have 2 different types of clones. (If you pressed up arrow, then it will be 3 different types of clones in total) Pess 1 2 3 for different backdrops.
Thanks to Mahizhan.
