chibiz

5 feet but first try with yourself by using your hand as a target to be read fo something closer. On your first tries when you are practicing with reading work with a white surface behind the oblect being read. that way you can see the coloring better. then work your way with other colors behind the object. When you are done with that, work on two  or more objects at the same time. when you get past the one object limit start working on moving objects.