Video:

Schematic:

Code:

int generatingNum = 0;

int buttonPin = 9;
int speakerPin = 2;

void setup() {
pinMode(buttonPin, INPUT);
pinMode(speakerPin, OUTPUT);

pinMode(13, OUTPUT); // 1
pinMode(12, OUTPUT); // 2
pinMode(11, OUTPUT); // 4a
pinMode(10, OUTPUT); // 6a
randomSeed(analogRead(0));

}

void loop() {
int buttonState = digitalRead(buttonPin);
if (buttonState == HIGH && generatingNum == 0) {
generateNum();
}
}

void generateNum() {
generatingNum = 1;
int currentNum = 0;
for (int i=5; i<=25; i++) { showNum(0); delay(100); int nextNum = (int)random(1, 7); while (nextNum == currentNum) { nextNum = (int)random(1, 7); } currentNum = nextNum; showNum(currentNum); double delayTime = (.5*i + i*i*i)/20; digitalWrite(speakerPin, HIGH); delay(delayTime); } generatingNum = 0; } void showNum(int num) { digitalWrite(13, LOW); digitalWrite(12, LOW); digitalWrite(11, LOW); digitalWrite(10, LOW); switch (num) { case 1: digitalWrite(13, HIGH); break; case 2: digitalWrite(12, HIGH); break; case 3: digitalWrite(13, HIGH); digitalWrite(12, HIGH); break; case 4: digitalWrite(12, HIGH); digitalWrite(11, HIGH); break; case 5: digitalWrite(13, HIGH); digitalWrite(12, HIGH); digitalWrite(11, HIGH); break; case 6: digitalWrite(12, HIGH); digitalWrite(11, HIGH); digitalWrite(10, HIGH); break; default: digitalWrite(speakerPin, LOW); break; } } [/sourcecode]