CHIPMUNK: create multiple Shapes with same Name and remove the first, second...

[AlphaMensch]

hi

I want to develop a game with chipmunk:
You have to draw a line before the ball falling down. And if you draw 5 lines the first should remove from the space.
My code:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
	UITouch *touch = [[event allTouches] anyObject];
	
	location1 = [touch locationInView:self.view];
	
	BEX=location1.x;
	BEY=480-location1.y;
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
	UITouch *touch = [[event allTouches] anyObject];
	
	location2 = [touch locationInView:self.view];
	
	ENX=location2.x;
	ENY=480-location2.y;

	splineBody = cpBodyNew(INFINITY, INFINITY);
	splineShape = cpSegmentShapeNew(splineBody, cpv(BEX, BEY), cpv(ENX, ENY), 0);
	splineShape->e = 1; splineShape->u = 0.1; splineShape->collision_type = 0;
	cpSpaceAddStaticShape(space, splineShape);
	splineCount += 1;

	if (splineCount >= 5) {
		NSLog(@"deleted");
		cpSpaceRemoveStaticShape(space, splineShape);
	}else {
		NSLog(@"newShape");
		NSLog(@"%i,%i,%i,%i",BEX,BEY,ENX,ENY);
	}	
		
}

But if I do this it remove the Line i draw at the moment. So I cant draw a new line.
Is there a way to do that?

AlphaMensch