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