#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars and 2 line display

int i = 0;
char msg[20] = "Syntex 50% Sump 20% ";
int x = 0;
int op = 7;
int sp = 16;
int testingV = 7;
void setup()
{
  //Serial.begin(9600);
  lcd.init();                      // initialize the lcd 
  lcd.init();
  // Print a message to the LCD.
  Serial.begin(9600);
  lcd.backlight();
  lcd.print("Hey I am Arduino    ");
  i = sizeof(msg);
  //i = strlen(msg);

  /*
  Serial.println(strlen(msg));
  Serial.println(sizeof(msg));

  for(int y = 0;y < i;y++){
    Serial.print(y);
    Serial.print(" ");

    Serial.println(msg[y]);
  }
  
  Serial.println(" ");
  Serial.print(i-2);
  Serial.print(" ");
  Serial.print(msg[i-2]);
  Serial.print(" ");
  Serial.print(i-1);
  Serial.print(" ");
  Serial.print(msg[i-1]);
  Serial.print(" ");
  Serial.print(i);
  Serial.print(" ");
  Serial.print(msg[i]);
  Serial.println(" ");
  */
}

void loop()
{
  
  lcd.setCursor(0,1);

  float opf = getPercentage(op, 20);
  char ops[5];
  dtostrf(opf, 4, 2, ops);
  //Serial.println(ops);

  //OHT % age update
  msg[op] = ops[0];
  char opx = ' ';

  if(opf > 9.0){
      opx = ops[1];
  }
    if(op >=19){
      msg[0] = opx;
    }
    else{
      msg[op+1] = opx;
    }

  float spf = getPercentage(sp, 20);
  char sps[5];
  dtostrf(spf, 4, 2, sps);


  //Sump % age update
  msg[sp] = sps[0];
  char spx = ' ';

  if(spf > 9.0){
      spx = sps[1];
  }
    if(sp >=19){
      msg[0] = spx;
    }
    else{
      msg[sp+1] = spx;
    }


  lcd.print(msg);

  char pmsg = msg[0];

  for(x = 0;x < i;x++)
  {
    msg[x] = msg[x+1];
  }
  msg[i-1] = pmsg;


 
  if(sp <= 0){
    sp = 19;
  }
  else{
    sp = sp-1;
  }
  if(op <= 0){
    op = 19;
  }
  else{
      op = op -1;
  }
  //Serial.println(getPercentage(12.0,  50.0));

  //Serial.println(msg);
  //Serial.println((msg<<8));

  delay(300);

  /*
    lcd.setCursor(i,0);
    lcd.print("I am Arduino    ");
    lcd.setCursor(i,1);
    lcd.print("How are you man ");
    //Serial.println("How are you man");
    i--;

    if(i < -1){
      i=16;
      
      lcd.clear();
    }

  delay(200);
    */

}

float getPercentage(float senceValue, float  refValue){

  return (float)(((float)senceValue/(float)refValue)*100.0);

}