// interface function you need to fill
void setup( ) {
  // code here executes once

}


// interface function you need to fill
void draw( )  {
  // code here executes repeatedly

}


// example function that has no returned value 
void my_function_1 ( ) {
  // your custom function defined here

}


// example function that returns an integer 
int my_function_2 ( ) {
  // your custom function defined here 
  int result = 0;
  return result;
}


// example function that returns a floating point number 
float my_function_3 ( ) {
  // your custom function defined here
  float result = 1.0;
  return result;
}