the machine is made of metal 
the machine is grey in color
the donuts are brown
Dough is being dropped from the machine.
donuts on a conveyer
donuts on a conveyer belt
round donuts being cooked
donuts being cooked by a machine
a conveyor belt with donuts
a convey belt with circle dontus
donuts being cooked
round donuts cooking
cooked circle donuts
cooked round donuts
donuts are going down the conveyor belt like donuts