On one picture frame I glued rectangular strips of foam board - leaving gaps in between - and on the other picture frame I glued circles. The circles are positioned in such a way that they fill the gaps of the other stamp:
Place your fabric on the printing board and put 2 different colors of paint on 2 plastic plates. Apply one color of paint on a stamp using a foam brush (roller or brayer) and place the stamp where you want it on the fabric. Repeat this process till you are satisfied.
Now it is time for the second stamp and the other color of paint. Again apply the paint to the stamp and position your stamp in such a way, that the painted objects will be on the still blank fabric. The endresult looked like this:
I also did a sample with a tree shape. Again the foam board was glued to 2 different picture frames.
I used 2 different colors of paint, here is the first one:
And the second one: