The first problem is that you're declaring variables twice:
int ledpinFour = 2;
int ledpinFive = 3;
int ledpinFour = 4;
int ledpinFive = 6;
int ledpinFour = 5;
int ledpinFive = 6;
You can only have one called "ledpinFour" or "ledpinFive".
The error "conflicting types for ledVizOne" is because you need a function prototype at the top of your code. (This won't be necessary in Arduino 0004). That is, you'll need something like this:
void ledVizOne();
for each of your functions.