Step 2:

The side with bars 1 to 4 went down. Therefore one of bars 1 to 4 is heavy or one of bars 5 to 8 is light.

Place bars 1, 2 and 5 on the left side and bars 3, 4 and 9 on the right. Click the appropriate picture.

 

                 Click here if the 1 to 4 side goes down                   Click here if it balances               Click here if bars 5 to 8 go down