MagicShape is a interesting app,You can create a lot of gorgeous graphics animation by editing two math formula.Usage of MagicShape is simple,You can specify color of graphics by using red ellipse button,green ellipse button,and blue ellipse button.there is a white dot in the front of these buttons,The color of dot should is blue when you touch these button and you can type number to edit color of graphics by touch digit button at the moment,value of color is 0-100. Most important thing is edit "x=" and "y =" formulas,You must touch "x=" or "y=" before you edit formula,there is a white dot in the front of "x=" and "y=", in the same way, the dot should is blue color when you touch thing at the back of it,You can edit them by touching two rows of white buttons,bear in mind,you must touch things before you edit them.I already edit some formula,them is present in screenshots of app.You should use "SIN","COS" and "I" in formulas for pretty graphics animation.You can erase a character by touching "clear" button,and you can save your work into album by touching "save" button.I hope you like it.