What makes a home earthquake proof?

These are a list of things that make a home earthquake proof:

• External walls are 6 inches thick. 
• Steel bars on the inside of walls.
• Reinforced concrete as the foundation.
• Hard soil under the home.
• Steel bars in the roof.

Outcome of our earthquake proof house:

It was not successful because it didn't have a flat base because by the time I started it I didn't have the resources I needed. Architects make deep foundations to keep tall buildings stable.