#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C LCD(0x27,16,2);
int button = 13;
int buttonstate = 0;
int laststate = 0;
int time = 0;
int count = 0;

void setup() {
   LCD.init(); 
   LCD.backlight();
   Serial.begin(9600);
  pinMode(button, INPUT);
}

void loop() {
  LCD.setCursor(0,1);
buttonstate = digitalRead(button);
if(buttonstate==HIGH && laststate == LOW ){
 for(int i=0; i<30; ++i){ 
   ++count;
  LCD.println(count);
 }
}
else if (buttonstate == LOW && laststate == HIGH){
  laststate == LOW;
}

if (count == 1){
Serial.println("Time: ");
time = micros();
Serial.print(time);

 if(time == 300000){
   LCD.println(count);
   LCD.setCursor(4,1);
   LCD.print("vm:");
   LCD.setCursor(8,1);
   int vm = 30 - count;
   LCD.print(vm);
 }
}

if (count == 30){
  LCD.println(count);
  LCD.setCursor(4,1);
  LCD.print("vm:0");
}

}