'Release' when using a L293D and not a motorshield

Projects Programming
1

I'm trying to figure out how to release my bipolar stepper using a Arduino mini-pro and L293D h-bridge.
The project requires things to be as compact as possible so I do not want to use an easydriver or motorsheild if possible.

This is the code I have which is working:

#include <Stepper.h>

#define motorSteps 200

#define Black 12
#define Green 13
#define Red 14
#define Blue 15
#define ledPin 13
int Step;

// initialize of the Stepper library:
Stepper myStepper(200, Black, Green, Red, Blue);

void setup() {
// set the motor speed at 60 RPMS:
myStepper.setSpeed(60);

Step = 0;

// Initialize the Serial port:
Serial.begin(9600);

// set up the LED pin:
pinMode(ledPin, OUTPUT);
// blink the LED:
blink(3);
}

void loop() {

myStepper.setSpeed(10);
// Step forward 100 steps:
Serial.println("10 Rpm");
myStepper.step(200); // forward one rotation
delay(200);

myStepper.setSpeed(30);
// Step forward 100 steps:
Serial.println("1 Rpm");
myStepper.step(-200); // back one rotation

delay(175000); // delay just under 3 minutes
}
}

rather than the (175000) delay above, I would prefer to 'release' or turn off the stepper for this duration - Save energy and reduce the heat on the IC and motor. It would then loop again.

I have been unable to track down the appropriate code to do so. Any suggestions?
Thanks