100 Doors 2014 Level 26 27 28 29 30

100 Doors 2014 Level 26 Walkthrough
Turning on the 4 lights on the wall by pressing every button on the floor.
To make it easier we give the number of 1234 left every lights and buttons.
Press the button on the floor and see the flashing lights and totalizing.
The answer:
Button 1: 2 +1 +3 = 6
Button 2: 3 + 2 = 5
Button 3: 4 + 4 = 8
Button 4: 1 = 1 +1 +1 +4 = 7
Then enter the number 6587 in the