You can do this if you think outside of the box and with a bit of effort.
Make 3 models of your Tree, or line or whatever it is you want to do this to.
Model 1 will have pixels 1,4,7,10
Model 2 will have pixels 2,5,8,11
Model 3 will have pixels 3,6,9,12
Red on Model1
Green on Model2
Blue on Model3
Now you can do red chases left to right, while blue chases right to left, etc.