when green flag clicked //when the project starts
forever //do this over and over again
    
if <key [up arrow v] pressed?> then //if you're pressing the up arrow key
    change y by (5) //change the sprite's up-down position by 5 "pixels"
end

if <key [down arrow v] pressed?> then //if you're pressing the down arrow key
    change y by (-5) //change it by -5 pixels, making it go down instead
end
end