Need quick help with Memsic 2125.

Other Hardware Sensors
4 
const int xP = 11;
const int yP = 12;

  pinMode(xP, INPUT);
  pinMode(yP, INPUT);

  px = pulseIn(xP, HIGH);
  py = pulseIn(yP, HIGH);

The code appears to use pins 11 and 12 but the circuit doesn't

Am I missing something obvious ?