Simple Vr project " Bell"

The VR app like this:
There are good quality , alive city and elevator , bridge, and bell like the reference video.
At first I want to setting the bridge lenth, width, high.
And then I start with setting I have done.
Start position, I am in the elevator and I press shutting door button and then the elevator goes up to the top of building.
In there , there are Bell and wooden panel. I walk on the panel and , at the end of panel, I hold the string of bell and shake it and then the bell is ringing.
And out of the panel, I will fall. And hit the ground with white dizy effect like reference video.
I can go into the elevator again and press shutting door button and play go on again.