import ch.aplu.nxt.*;
class exemple 
{
exemple()
{
TurtleRobot monrobot = new TurtleRobot();    
for (int k = 1; k < 5; k++ )
{	
switch(k)
{
       case 1:       
       monrobot.forward(10);
       break;
       
       case 2:
       monrobot.forward(20);
       break;
       
       case 3:
       monrobot.forward(30);
       break;

       case 4:
       monrobot.backward(60);
       break;
      }

     }
    monrobot.exit();
 }

  public static void main(String[] args)
 {
    new exemple();
 }
}