Automatic Left Electric Switch

What there is most of

• Tile 2 x 2 without Groove with Train Point Left, 2 Print · White×2
• Brick 1 x 2 x 2 with Bottom Tube and Train Point Left Print · White×1
• Train Track 12V Switch Button · Blue×1
• Vehicle Track, Train, 12V Switch Point Left, Type 1 Automatic [Complete Assembly] · Blue×1
• Wire with 1 x Narrow 2-Prong Connector and 1 x Wide 2-Prong Connector, 12V, 16L · White×1

The twenty most numerous parts, longest bar first. Start a checklist to see all 5 part types and tick them off as you find them.