Keep your back flat while reaching one arm over your head as far as you can.
Keep your back flat and reach your hand behind you and as high up your back as you can.
Place your ankle(not your foot) on your thigh as high as you can and try to get the knee of the same ankle as low as it will go.
Keep your legs straight and your back flat and get as close to touching the ground as you can. Do not round your spine to get closer to the ground.
Move your foot as far from the wall as you can while keeping it flat and touching your knee to the wall.