Stepper Motor Random Run Sequence with Wait Time

// Anjeel First Program
#include <AFMotor.h>
// Connect a stepper motor with 48 steps per revolution (7.5 degree)
// to motor port #2 (M3 and M4)
AF_Stepper motor1(48, 2);

void setup() {
  Serial.begin(9600);           // set up Serial library at 9600 bps
  Serial.println("Stepper test!");
  motor1.setSpeed(50);  // 50 Step Speed corresponding rpm 
}
void loop() {
  {
  Serial.println("Double coil steps");
  motor1.step(100, FORWARD, DOUBLE);
  delay(1000);  // add delay of 50 steps seconds
}
{
  motor1.step(100, BACKWARD, DOUBLE);
    delay(1000);  // add delay of 50 steps seconds
}

  {
  Serial.println("Double coil steps");
  motor1.step(50, FORWARD, DOUBLE);
  delay(500);  // add delay of 50 steps seconds
}
{
  motor1.step(100, BACKWARD, DOUBLE);
    delay(500);  // add delay of 50 steps seconds
}

{
  motor1.step(50, BACKWARD, DOUBLE);
    delay(1000);  // add delay of 50 steps seconds
}

{
  motor1.step(100, BACKWARD, DOUBLE);
    delay(1000);  // add delay of 50 steps seconds
}
}