[ø] OnActivate > Self > FireRelay
[ø] OnRelay > Self > SetColor
[200] OnRelay > Self > SetColor
[400] OnRelay > Self > SetColor
[600] OnRelay > Self > FireRelay
The numbers in the boxes are the delays for the events. Put different colors in the three "SetColor" boxes, and this should work well.
This could be wrong too; I haven't played Blockland in a while.