[change x by (<key (right arrow) pressed?> - <key (left arrow) pressed?>)] [change y by (jump vel)] {if <y < -40> then [set [jump vel] to (0)] [set y to (-40)] } {if <<y = 40> and <key (up arrow) pressed?>> then [set [jump vel] to (20)] } [change [jump vel] by (-1)]
