I still don't know exactly how you want to do this, but I have an idea.
int valFenabled = 1;
int valSenabled = 0;
void loop()
{
valF = analogRead(forcePin); // read value of force sensor
valS = digitalRead(switchPin); // read value of switch
if (valF>=thresHold && valFenabled) { // waits for force sensor to equal or pass pressure threshold
//and makes sure the button hasn't been pressed before
valFenabled = 0; //signal that button has been pressed before to prevent re-triggering
delay(1000);
digitalWrite(RedPin, LOW); // turns on red LED
delay(1000); // waits one seconds
digitalWrite(RedPin, HIGH); // turns on red LED
delay(500); // waits half second
valSenabled = 1;
}
if (valS>=thresHold && valSenabled) { // waits for force sensor to equal or pass pressure threshold
//and makes sure the button hasn't been pressed before
valSenabled = 0; //signal that button has been pressed before to prevent re-triggering
delay(1000);
digitalWrite(RedPin, LOW); // turns on red LED
delay(1000); // waits one seconds
digitalWrite(RedPin, HIGH); // turns on red LED
delay(500); // waits half second
valFenabled = 1;
}
Each button will enable the other after doing whatever... Did you write the other code or look at it from examples?