HERE'S THE CODE...

this is the code we used to generate random numerical inputs that represent different pressure levels (since the pressure sensor is flying here and will arrive at a later date).  So, in this case, the number 0 represents the atmospheric lowest pressure level, and the number 5 represents the highest.  

int blueoneLED=12;   //Pin12 = Blue LED (lowest)

int bluetwoLED=11;   //Pin11 = blue LED (higher)

int greenoneLED=10;    //Pin10 = green LED (lower)

int greentwoLED=9;                                  //Pin9 = green LED (higher)

int yellowoneLED=8;                                 //Pin8 = yellow LED (lower)

int yellowtwoLED=7;                                 //Pin7 = yelow LED (higher) 

//long val=0;    //variable o store the value coming from the sensor

long randNumber;

void setup()

{

  pinMode(blueoneLED, OUTPUT);  //LED set to output

  pinMode(bluetwoLED, OUTPUT);  //LED set to output

  pinMode(greenoneLED, OUTPUT);  //LED set to output

  pinMode(greentwoLED, OUTPUT);                   //LED set to output

  pinMode(yellowoneLED, OUTPUT);                  //LED set to output

  pinMode(yellowtwoLED, OUTPUT);                  //LED set to output

  Serial.begin(9600);

} 

void loop ()  //loop below process

{

  randNumber = random(6);        //select random number from 0 to 6 

  Serial.println (randNumber); //print random value on serial screen

  if (randNumber == 0)    //Check if selected number is 0 (lowest air pressure)

  {

    digitalWrite (blueoneLED, HIGH); //If so... turn LED on

    digitalWrite (bluetwoLED, LOW);    

    digitalWrite (greenoneLED, LOW);     

    digitalWrite (greentwoLED, LOW);

    digitalWrite (yellowoneLED, LOW);

    digitalWrite (yellowtwoLED, LOW);  

  }

  else if (randNumber == 1)  //if selected number is 1 (low air pressure)

  {

    digitalWrite (blueoneLED, HIGH); //turn LED on

    digitalWrite (bluetwoLED, HIGH);  //turn LED on

    digitalWrite (greenoneLED, LOW);    

    digitalWrite (greentwoLED, LOW);

    digitalWrite (yellowoneLED, LOW);

    digitalWrite (yellowtwoLED, LOW);  

  }

  else if (randNumber == 2)      //if selected number is 2 (medium-low air pressure)

  {

    digitalWrite (blueoneLED, HIGH); //turn LED off

    digitalWrite (bluetwoLED, HIGH);   //turn LED off

    digitalWrite (greenoneLED, HIGH);   //turn LED on

    digitalWrite (greentwoLED, LOW);

    digitalWrite (yellowoneLED, LOW);

    digitalWrite (yellowtwoLED, LOW);

  }

  else if (randNumber == 3)

  {

     digitalWrite (blueoneLED, HIGH); //turn LED off

    digitalWrite (bluetwoLED, HIGH);   //turn LED off

    digitalWrite (greenoneLED, HIGH);   //turn LED on

    digitalWrite (greentwoLED, HIGH);

    digitalWrite (yellowoneLED, LOW);

    digitalWrite (yellowtwoLED, LOW);

  }

  else if  (randNumber == 4)

  {

   digitalWrite (blueoneLED, HIGH); //turn LED off

    digitalWrite (bluetwoLED, HIGH);   //turn LED off

    digitalWrite (greenoneLED, HIGH);   //turn LED on

    digitalWrite (greentwoLED, HIGH);

    digitalWrite (yellowoneLED, HIGH);

    digitalWrite (yellowtwoLED, LOW);

  }

  else if (randNumber == 5)

  {

    digitalWrite (blueoneLED, HIGH); //turn LED off

    digitalWrite (bluetwoLED, HIGH);   //turn LED off

    digitalWrite (greenoneLED, HIGH);   //turn LED on

    digitalWrite (greentwoLED, HIGH);

    digitalWrite (yellowoneLED, HIGH);

    digitalWrite (yellowtwoLED, HIGH);

  }

  

  delay(5000); //wait for 10 seconds

}  //End of process, go back to start of loop