(unstack green yellow robot)
(put-down green robot)
(unstack yellow blue robot)
(put-down yellow robot)
(unstack blue orange robot)
(put-down blue robot)
(unstack orange purple robot)
(put-down orange robot)
(unstack purple red robot)
(put-down purple robot)
(pick-up orange robot)
(stack orange red robot)
(pick-up purple robot)
(stack purple orange robot)
(pick-up yellow robot)
(stack yellow purple robot)
(pick-up blue robot)
(stack blue yellow robot)
(pick-up green robot)
(stack green blue robot)