Open Sesame!

Unfortunately the magic words won’t open this door.
Can you work out the key sequence to unlock the door?
Click or tap on the number pad and the lights will change.
Show all green lights to open the door.

You can close the doors to have another go or to let someone else try.
If you really give up there is an emergency solution reveal here.

Five keys. Click or tap 2,7,7,9,9