void setup() {


pinMode(30, OUTPUT);
pinMode(31, OUTPUT);
pinMode(32, OUTPUT);
pinMode(33, OUTPUT);
pinMode(34, OUTPUT);
pinMode(35, OUTPUT);
pinMode(36, OUTPUT);
pinMode(37, OUTPUT);
pinMode(38, OUTPUT);
pinMode(39, OUTPUT);
pinMode(40, OUTPUT);
pinMode(41, OUTPUT);
pinMode(42, OUTPUT);
pinMode(43, OUTPUT);
pinMode(44, OUTPUT);
pinMode(45, OUTPUT);
pinMode(46, OUTPUT);
pinMode(47, OUTPUT);

}

void prog_1() {

for (int i = 30; i <= 47; i++) {
        digitalWrite(i, HIGH);
        delay(200);}

for (int i = 47; i >= 30; i--) {
        digitalWrite(i, LOW);
        delay(200);}

}        

void prog_2_high_even() {
digitalWrite(30, HIGH);
digitalWrite(32, HIGH);
digitalWrite(34, HIGH);
digitalWrite(36, HIGH);
digitalWrite(38, HIGH);
digitalWrite(40, HIGH);
digitalWrite(42, HIGH);
digitalWrite(44, HIGH);
digitalWrite(46, HIGH);
}

void prog_2_low_even() {
digitalWrite(30, LOW);
digitalWrite(32, LOW);
digitalWrite(34, LOW);
digitalWrite(36, LOW);
digitalWrite(38, LOW);
digitalWrite(40, LOW);
digitalWrite(42, LOW);
digitalWrite(44, LOW);
digitalWrite(46, LOW);
}

void prog_2_high_odd() {
digitalWrite(31, HIGH);
digitalWrite(33, HIGH);
digitalWrite(35, HIGH);
digitalWrite(37, HIGH);
digitalWrite(39, HIGH);
digitalWrite(41, HIGH);
digitalWrite(43, HIGH);
digitalWrite(45, HIGH);
digitalWrite(47, HIGH);
}
void prog_2_low_odd() {
digitalWrite(31, LOW);
digitalWrite(33, LOW);
digitalWrite(35, LOW);
digitalWrite(37, LOW);
digitalWrite(39, LOW);
digitalWrite(41, LOW);
digitalWrite(43, LOW);
digitalWrite(45, LOW);
digitalWrite(47, LOW);
}
void prog_2() {

prog_2_high_even();
prog_2_low_odd();
delay(200);
prog_2_low_even();
prog_2_high_odd();
delay(200);

}

void prog_3() {
prog_2_high_even();
prog_2_high_odd();
delay(200);
prog_2_low_even();
prog_2_low_odd();
delay(200);
}

void prog_4() {

for (int i = 30; i <= 47; i++) {
        digitalWrite(i, HIGH);
        delay(200);}


for (int i = 30; i <= 47; i++) {
        digitalWrite(i, LOW);
        delay(200);}

}  
void loop() {

prog_1 ();
prog_2 ();
prog_2 ();
prog_2 ();
prog_3 ();
prog_3 ();
prog_3 ();
prog_4 ();

int randprog = random(1, 4);

if (randprog==1) {prog_1 ();}
if (randprog==2) {prog_2 ();prog_2 ();prog_2 ();}
if (randprog==3) {prog_3 ();prog_3 ();prog_3 ();}
if (randprog==4) {prog_4 ();}
}