#include <LiquidCrystal.h>
#include <Streaming.h>


LiquidCrystal lcd( 18, 11, 19, 20, 21, 22, 23 );

int status = 15;
int position = 8;
int mod = 0;
unsigned long prev = 0;

void setup( )
{
  pinMode( status, OUTPUT ); 
  digitalWrite( status, HIGH );
  Serial.begin( 9600 );
}

void loop( ) {  
  int x, y;
  
  x = analogRead( 6 );
  y = analogRead( 7 );
  
  Serial << x << " " << y << endl;
  
  if( x>y ) mod = 1;
  else if( x<y ) mod = -1;
  else mod = 0;
  
  if ( millis( ) - prev > ( 2200-x-y ) ) {
    lcd.clear( );
    
    prev = millis( );  
    position += mod;
    if( position > 16 ) position = 0;
    if( position < 0 ) position = 16;
    
    lcd.setCursor( position, 1 );
    lcd.print( "^" );
  }
  delay( 100 );
}