read timer 1

i want to do this (but frq of pin 5 must be 200hz )!

                                         //step 1
void loop() {
  digitalWrite(5, LOW);
  delayMicroseconds(x);
  digitalWrite(5,HIGH);
  Timer1.restart();
  // analogRead & delay .... here 
     //
     //
  //4800-readtimer1 in microseconds!
  delayMicroseconds(4800-readtimer1 in microseconds);


                                                  //step 2
    digitalWrite(5, LOW);
  delayMicroseconds(x);
  digitalWrite(5,HIGH);
  Timer1.restart();
  // analogRead & delay .... here 
     //
     //
  //4800-readtimer1 in microseconds!
  delayMicroseconds(4800-readtimer1 in microseconds);



                                                   // step n