start by connecting to a lego boost device to scratch with scratch link. to connect go to the code and find a explanation point in the boost section then click on it and it will say stuff and it will tell you the rest. up arrow to move your device forward down arrow to move your device backward left arrow to move your device left(you should increase your speed turn more). right arrow to move your device right(you should increase your speed turn more). space to increase speed return/enter to decrease your speed N to change background A to spin motor C clockwise D to spin motor C counterclockwise