Marble Madness the Easy way

Marble Madness the easy way.
This one is a modified version of
https://www.thingiverse.com/thing:3041669

However:
- no pcb
- no electronics
- no microprocessor
- no programming

Just a relay, two micro switches and three AA or AAA batteries.
The 5 volt relay will operate perfectly at 4.5 volts as well.
The parts require no support or raft. The arm should be rotated 270 degrees over the X-axis to put it flat on the bed.
Don't increase the voltage. Due to the higher speed the marble