2. Use good balloons (usually pearlescent balloons)

3. Fill two barrels with cement, insert a stainless steel tube into them and let it dry thoroughly.

4. Insert a section of 1.5m stainless steel pipe, 5. Tie balloons of the same color together (spare 3 times, tie two knots to prevent balloons from leaking).

6. Wrap the balloons of two colors together, and put the stainless steel tube in the middle of the balloons of different colors, just rotating the wrong color.

7. Add another layer to the top. The balloon on the top and the balloon on the bottom are a little staggered. Then by analogy, buy a PVC pipe (usually 4 meters).

8. Wrap the balloon in the same way, leave a little on each side and insert it into the finished stainless steel tube. Generally, the length of the arch of a storefront is the height of a wide storefront (for example, a storefront is 4 meters wide and a signboard is 3 meters high to make 7 meters). If the storefront is low, you can throw a small balloon at both ends of the PVC pipe.

If you want the column to be bold

A similar method can be used.

Outside the inner ring ball column

Add another layer

6 balls per layer