accessibilitySlide ( XnYn=None, t=None ) Accessibility Slide the Screen with Multi Points , XnYn is a Coordinate Set consisting of n points ( X1, Y1, X2, Y2, …… Xn, Yn ) , Coordinates X=Y=0 means the Center of the Screen , The Coordinates X and Y can be Integers or Decimals such as 0.5 or -1.5 , parameter Integer t is the Slide Time for Milliseconds , default value None means 50*n ( 50n milliseconds ) .