Step one:Draw a circle on the glass first.

Step 2:After drawing a circle, strike along the cutting line on the back of the glass. (strike the circle first, then square the lines, mainly to avoid breaking the glass when hitting the square.)

Step 3:On the glass front, draw some small squares in the circle to make it easier to hit the glass.

Step four:Cracks can appear when the glass is struck along the small grid lines on the back of the glass.

Step 5:Gradually remove the squares within the circle by tapping the squares.