Step one:
First draw a horizontal line.
Step 2:
Then draw two rectangles on top, note that the top one is smaller.
Step 3:
Draw two more strip shapes on top, and connect them with the same strip in the middle.
Step 4:
Then draw two short arcs on both sides and connect them with arcs.
Step 5:
Draw circles and sharp corners on top as decoration.
Step 6:
In the middle of the pavilion, draw horizontal bars and add a few short arcs as railings.
Step 7:
Use arcs on both sides to draw the shape of the grass.
Step 8:
Finally, paint it with a nice color, and the pavilion is complete.