The solution on this page is for The Hall of the Lightfoot key requirement encountered in Another Dimension during The Oracle's Fire.
The key is in a room with deadly traps and stones which need activation. The trick is the sequence, mistakes can be deadly.
With the door at your back, activate the stones in the following order.
Middle - right side
Furthest (closest to key) - right side
Closest - left side
Closest - right side
Middle - left side
Furthest (closest to key) - left side