code: public void fillRect(float x1, float y1, float width, float height) {
  		predraw();
  		TextureImpl.bindNone();
  		currentColor.bind();
  
  		GL.glBegin(SGL.GL_QUADS);
  		GL.glVertex2f(x1, y1);
  		GL.glVertex2f(x1 + width, y1);
  		GL.glVertex2f(x1 + width, y1 + height);
  		GL.glVertex2f(x1, y1 + height);
  		GL.glEnd();
  		postdraw();
  	}
docs: Fill a rectangle on the canvas in the current color
  
  @param x1
  The x coordinate of the top left corner
  @param y1
  The y coordinate of the top left corner
  @param width
  The width of the rectangle to fill
  @param height
  The height of the rectangle to fill