QTI Sensors

hi working on robot follow line @ moment trying figure out how make qti parallax sensors work on arduino code using follows:

void setup()
{
serial.begin(9600);
}

void loop()
{
serial.println(rctime(13)); // connects pin 13, displays results

}
long rctime(int sensorin)
{
long duration = 0;
pinmode(sensorin, output); // sets pin output
digitalwrite(sensorin, high); // pin high
//delay(1); // waits 1 millisecond
pinmode(sensorin, input); // sets pin input
digitalwrite(sensorin, low); // pin low
while(digitalread(sensorin)){ // waits pin go low
duration++;
}
return duration; // returns duration of pulse
}




i want know if there way integrate whole code can use sensors follow line , turning when according sensors reading  motor code using follows:


int motorpin1 = 3;                  //define digital output pin no.

int motorpin2 = 4;                  //define digital output pin no.

int motorpin5 = 5;                 // define digital output pin no.

int motorpin7 =6;                  // define digital output pin no.

void setup () {

  pinmode(motorpin1,output);        //set pin 3 output

  pinmode(motorpin2,output);        // set pin 4 output
 
  pinmode(motorpin5,output);        // set pin 5 output

  pinmode(motorpin7,output);        // set pin 7 output

}

void loop () {

  digitalwrite(motorpin1,low);

  digitalwrite(motorpin2,high);
 
  delay(100);
 
  digitalwrite(motorpin5,low);
 
  digitalwrite(motorpin7,high);
  delay (3000);




 
  digitalwrite(motorpin1,high);
 
  digitalwrite(motorpin2,low);
 
  delay(100);
 
  digitalwrite(motorpin5,high);
 
  digitalwrite(motorpin7,low);
 
  delay(100);
 
}

any or suggestions?

also motors because dc- motors connected them l-293d chip

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