How to add a switch between normal and reverse controls

Hi im new to construct 2 however I cant get to solve this problem. How can I add a time switch on the character controls during gameplay to shift from the normal WASD to reverse controls? To give an example on my question the controls have to change when the players health bar decreases by time Thanks in advance for your time

Add boolean instance variable "reversedControls" to the character.

You can use Timer behavior to set this variable to true.

Then do this:

Keyboard key W is down
    Player is boolean reversedControls set -> Player simulate control Down
    Else                                  -> Player simulate control Up
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