Random ramping of motor

Hi there , i am wondering how to ramp a 12 volt dc motor to increase and decrease in speed randomly. Rather than go from 0 to 255 and down to zero. Eg from 0 to 255 then down to 100 back to 200 down to 50 etc i am using cryton mdda20 and library

thankyou in advance

my code as follows

//Initializing LED Pin

#include "CytronMotorDriver.h"
//int led_pin = 13;
CytronMD motor1(PWM_DIR, 3, 4);  // PWM 1 = Pin 3, DIR 1 = Pin 4.
//CytronMD motor2(PWM_DIR, 9, 10); // PWM 2 = Pin 9, DIR 2 = Pin 10.


void setup() {
  Serial.begin (9600);
}
void loop() {
  //ramping the motor
  for (int i = 0; i < 255; i++) {
    move_motor1(i);

    Serial.print("int up........");
    Serial.println(i);
    //delay(5);
  }
  for (int i = 255; i > 0; i--) {
    //
    Serial.print("int down........");
    Serial.println(i);

    move_motor1(i);
    //delay(5);
  }
}
void move_motor1(int i)
{
  motor1.setSpeed( i);


}

what about? (add motor control)

// random control of motor

int speed = 0;
int targetSpd;

void
loop ()
{
    targetSpd = random (0,255);

    Serial.print   ("targetSpd ");
    Serial.println (speed);

    int  dSpd = targetSpd > speed ? 1 : -1;

    for ( ; speed != targetSpd; speed += dSpd)  {
        Serial.println (speed);
        delay (20);
    }
}

// -----------------------------------------------------------------------------
void
setup ()
{
    Serial.begin (9600);
}

thankyou worked a treat :slight_smile: