LeftSide = 0;
RightSide = 400;
Bottom = 0;
Top = 800;

StartX = 0.0;
StartY = 300.0;
Angle = 26;
Step = 0;
hit = 0; 
while(hit < 5){
  x = Step * sin(Angle)+StartX;
  y = Step * cos(Angle)+StartY;
  moveto((int)x, (int)y);
  Step ++;
  if(Angle >= 0 and Angle < 90){  //look for hit on right or top
    if(x >= RightSide){
      $hit++;
      Angle = 90 + 90 - Angle;
      StartX = RightSide;
      StartY = y;
      Step = 1;
    }
    if(y >= top){
      $hit++;
      Angle = 360 - Angle;
      StartX = x;
      StartY = Top;
      Step = 1;
    }
  }