#include <EEPROM.h>
long duration, inches;
int set_val,percentage;
bool state,pump;
void setup() {
  pinMode(8, OUTPUT);
  pinMode(9, INPUT);
  pinMode(10, INPUT_PULLUP);
  pinMode(11, INPUT_PULLUP);
  pinMode(12, OUTPUT);
   set_val=EEPROM.read(0);
   if(set_val>10)set_val=10;
   Serial.begin(9600);
}
void loop() {
   digitalWrite(3, LOW);
   delayMicroseconds(2);
   digitalWrite(8, HIGH);
   delayMicroseconds(10);
   digitalWrite(8, LOW);
   duration = pulseIn(9, HIGH);
   inches = microsecondsToInches(duration);
   percentage=(set_val-inches)*100/set_val;
      if(percentage<0)percentage=0;
   Serial.println("percentage of water is");
   Serial.println(percentage);
   if(percentage<95&digitalRead(11))pump=1;
   if(percentage>99)pump=0;
   digitalWrite(12,!pump);
  if(pump==1){
    Serial.println("ON");
   }
   else if(pump==0){
     Serial.println("OFF");
   } 
   if(!digitalRead(10)&!state&digitalRead(11)){
      state=1;
      set_val=inches;
      EEPROM.write(0, set_val);
      }
        if(!digitalRead(10)&!state&!digitalRead(11)){
        state=1;
        pump=!pump;
      }
      if(digitalRead(10))state=0;
      delay(1000);
}
long microsecondsToInches(long microseconds) {
   return microseconds / 74 / 2;
}