void pointy(SDL_Renderer *renderer, int width, int height)
{

	int x,y;
	SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
	for(x=10,y=10;x<width-10;x+=((width-20)/20),y+=((height-20)/20))
	{
	int dx= width - x;
	int dy= height - y;
	int error = 2*(dy-dx);
	while(1)
	{
		SDL_RenderDrawPoint(renderer,x,y);
		if (x==width && y==height) break;
		if(error<0) {x++; error+=2*dy;}
		else   {x++; y++; error+=2*(dy-dx);}
	}
}