[Lamp] Erase a rect

[vicnet]

I trying to figure how I can play Roll & Write game on reMarkable. For this, I need to roll dice.

Lamp could be a solution (in complement to genie) to draw dice. I can draw easily a dice.

I need to redraw the dice, so erase the zone where I just draw.

It is possible ? Which event to send ?

Remark: fastpen is not mentioned in Readme...