Make a 180 degree copy of the guide lines.
4. Lock this layer and make a new one above for the next set of guidelines. Make another blend with a line along the left and right side of the canvas space. Enter the number of steps you need (Iâ€™ve used 30 for a 32px grid) Expand the blend like before and make the guides. Select the guides and make a 90 degree rotated copy using the Rotate tool.
Draw a horizontal line across the left and right sides of the artboard.