_978_1_4302_4266_6_CH02_Listing2_1_.txt

/*Arduino LED Roulette
Posted by changb3 in Class Notes
Connect 3 LED’s to digital output pins 8, 11, and 13 (with resistors in serial with each).
Connect a pushbutton to pin 2 (and don’t forget the pulldown resistor).
[code]

/*
random light
*/
const int buttonPin = 2;
int lightpins[3] = {8,11,13};//Chsnge sequence of LEDs Here! 
int state=0;
void setup()
{
pinMode (buttonPin,INPUT);
pinMode (lightpins[0],OUTPUT);
pinMode (lightpins[1],OUTPUT);
pinMode (lightpins[2],OUTPUT);
digitalWrite (lightpins[0],LOW);
digitalWrite (lightpins[1],LOW);
digitalWrite (lightpins[2],LOW);
}
void loop ()
{
int reading = digitalRead (buttonPin);
int blinktime=20;
boolean done;
if (reading == HIGH)
{
if (state==0)
{
state=1;
done=false;
blinktime=20;
blinktime += 3;
while (!done)
{
for (int j=0;j<3;j++)
{
blinktime += random(3);
digitalWrite(lightpins[j],HIGH);
if (blinktime>200)
{
done=true;
break;
}
delay(blinktime);
digitalWrite(lightpins[j],LOW);
delay(blinktime);
}
}
}
}
else
{
state=0;
}
}