If you use your left foot to use the circles and your right hand to draw the 6 you can do it
Your brain just can't handle controlling one sides movement while another making two different directions...kinda like making sircles in the air with both hands, try to make the left hand turn towards you and making the right hand turn away from you.
I can actually do that one, you just gotta make it so your hands meet up at the top and bottom