adjusting lights with touch screen

Other Hardware Displays
1

I wrote a code for controlling some infrared lamps via some solid state relays, they use 0-5v to control 220v lamps I wrote the code for that very simple since I followed some instructions and examples but the hard part is where I need to attach a touch screen interface to adjust the lamps using the screen.

/*
 Designed by LYNCHPOWER ELECTRONICS FOR LifeSpan Co. LTD

 USed as temporary circuit for BM4500 Blow Molder heat lamps, replacing original motherboars.
*/

int tunnel1 = 3;           // the PWM pin the LED is attached to
int tunnel2 = 5;
int tunnel3 = 9;
int tunnel4 = 10;

// the setup routine runs once when you press reset:
void setup() {
  // declare pin 9 to be an output:
  pinMode(tunnel1, OUTPUT);
  pinMode(tunnel2, OUTPUT);
  pinMode(tunnel3, OUTPUT);
  pinMode(tunnel4, OUTPUT);
}

// the loop routine runs over and over again forever:
void loop() {
  // set the brightness of pin 9:
  analogWrite(tunnel1, 14);
  analogWrite(tunnel2, 14);
  analogWrite(tunnel3, 11.3);
  analogWrite(tunnel4, 7.5);

}

Thats the code I used to adjust each lamp, could I get some assitance with this, and I dont have a screen as yet.