thanks it works .
but somme point have bugs ( the position is not good when i draw it fastre )
electric shema :
____________________y1 touch screen
________ 10k homs ____________|__ A0 arduino
gnd arduino ------| ____________________y2 touch screen
|________ 10k homs ____________|__ A1 arduino
| ____________________x1 touch screen
|________ 10k homs ____________|__ A2 arduino
| ____________________x2 touch screen
|________ 10k homs ____________|__ A3 arduino
how can i ameliorate the sensibility and the presision ?