Step #1
Start the work by drawing a rectangle.
Step #2
Draw two flat rectangles.
Step #3
Make multiple tiny rectangles.
Step #4
Draw several small rectangles.
Step #5
Make three horizontal lines as shown.
Step #6
Draw thin rectangles & connected lines as shown.
Step #7
Make think rectangles & connected lines as shown.
Step #8
Finally, make necessary improvements to finish.