Using switch to change display pattern of 5 LEDs

[sourcecode language=”cpp”]
/*
Oscar’s project
switch lighting patern of 5 LEDs

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*/

int patern = 0;
// 0 all off
// 1 all on
// 2 one on at a time

int onLED = 1; // which LED is on? 1-5
int buttonState = 0;

int iPin = 0; // input pin

int oPin1 = 1; // output pins
int oPin2 = 2;
int oPin3 = 3;
int oPin4 = 4;
int oPin5 = 5;

void setup() {
// declare pin 9 to be an output:
pinMode(oPin1, OUTPUT);
pinMode(oPin2, OUTPUT);
pinMode(oPin3, OUTPUT);
pinMode(oPin4, OUTPUT);
pinMode(oPin5, OUTPUT);

pinMode(iPin, INPUT);
}

void loop() {

buttonState = digitalRead(input);
if (buttonState == 1){
if (patern >= 2) patern = 0;
else patern++;

onLED = 1; // reset onLED
buttonState = 0;
}

if (patern == 0) {
digitalWrite(oPin1, LOW);
digitalWrite(oPin2, LOW);
digitalWrite(oPin3, LOW);
digitalWrite(oPin4, LOW);
digitalWrite(oPin5, LOW);
}
else if (patern == 1) {
digitalWrite(oPin1, HIGH);
digitalWrite(oPin2, HIGH);
digitalWrite(oPin3, HIGH);
digitalWrite(oPin4, HIGH);
digitalWrite(oPin5, HIGH);
}
else {
switch (onLED) {
case 1:
digitalWrite(oPin1, HIGH);
digitalWrite(oPin2, LOW);
digitalWrite(oPin3, LOW);
digitalWrite(oPin4, LOW);
digitalWrite(oPin5, LOW);
break;
case 2:
digitalWrite(oPin1, LOW);
digitalWrite(oPin2, HIGH);
digitalWrite(oPin3, LOW);
digitalWrite(oPin4, LOW);
digitalWrite(oPin5, LOW);
break;
case 3:
digitalWrite(oPin1, LOW);
digitalWrite(oPin2, LOW);
digitalWrite(oPin3, HIGH);
digitalWrite(oPin4, LOW);
digitalWrite(oPin5, LOW);
break;
case 4:
digitalWrite(oPin1, LOW);
digitalWrite(oPin2, LOW);
digitalWrite(oPin3, LOW);
digitalWrite(oPin4, HIGH);
digitalWrite(oPin5, LOW);
break;
case 5:
digitalWrite(oPin1, LOW);
digitalWrite(oPin2, LOW);
digitalWrite(oPin3, LOW);
digitalWrite(oPin4, LOW);
digitalWrite(oPin5, HIGH);
break;
default:
digitalWrite(oPin1, LOW);
digitalWrite(oPin2, LOW);
digitalWrite(oPin3, LOW);
digitalWrite(oPin4, LOW);
digitalWrite(oPin5, LOW);

}

if (onLED >= 5) onLED = 1;
else onLED++;
}

delay(30);
}

[/sourcecode]