Redefinition of 'void setup ()'

Using Arduino Programming Questions
1

Hey, I'm new to Arduino and am just learning the basics. That being said, here's my problem:

Error:
redefinition of 'void setup ()'

My code:

void setup() {
}
void loop() {
}

int switchState = 0;

void setup () {
 pinMode (3, OUTPUT);
 pinMode (4, OUTPUT);
 pinMode (5, OUTPUT);
 pinMode (2, INPUT);
}

void loop() {
 switchState = digitalWrite(2);
 if (switchState == LOW) {
   //The button is pushed
   digitalWrite (3, LOW);
   digitalWrite (4, LOW);
   digitalWrite (5, HIGH);
   delay(250); //Wait a quarter of a second
   digitalWrite (4, HIGH);
   digitalWrite (5, LOW);
   delay(250);
 }
}

Any help is appreciated, thanks!

Moderator edit:
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tags added.

2

You define setup() and loop() twice. That is not valid C. Remove the first (empty) definitions.