func Draw(gc draw2d.GraphicContext, x0, y0, x1, y1 float64) {
	// Draw a line
	gc.MoveTo(x0, y0)
	gc.LineTo(x1, y1)
	gc.Stroke()
}
func Draw(gc draw2d.GraphicContext, x0, y0, x1, y1 float64) {
	
	gc.MoveTo(x0, y0)
	gc.LineTo(x1, y1)
	gc.Stroke()
}
func Draw ( gc draw2d . GraphicContext , x0 , y0 , x1 , y1 float64 ) { // Draw a line gc . MoveTo ( x0 , y0 ) gc . LineTo ( x1 , y1 ) gc . Stroke ( ) }
// Draw vertically spaced lines
Draw vertically spaced lines