int MaxRead=50;
const int MaxFunc=3;

byte LastKey=0;
int KeyCount=0;
int Bright=127;
byte flashState=0;

byte Funkce=1;

void setup() {
  // put your setup code here, to run once:
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(2, INPUT_PULLUP);
  pinMode(3, INPUT_PULLUP);
  pinMode(4, INPUT_PULLUP);
}

void ON()
{
  analogWrite(10,Bright);
  analogWrite(11,Bright);
}

void OFF()
{
  digitalWrite(10, LOW);
  digitalWrite(11, LOW);
}

void Flash01()
{
  digitalWrite(10,flashState);
  digitalWrite(11,flashState);
  MyDelay(200);
  flashState=!flashState;
}

void Flash02()
{
  digitalWrite(10,flashState);
  digitalWrite(11,!flashState);
  MyDelay(200);
  flashState=!flashState;
}
byte ReadKey()
{
  byte key=0;
  byte ReturnKey=0;

  if (!digitalRead(4))  {key=1;}
  if (!digitalRead(3))  {key=2;}
  if (!digitalRead(2))  {key=3;}
  
  delay(10);

  if (key)
  {
    if (LastKey==key)
    {
      KeyCount++;
    }
    else
    {
      LastKey=key;
      KeyCount=0;
    }
  }
  
  if (KeyCount>MaxRead)
  {
    ReturnKey=key;
    KeyCount=0;
  }

  return ReturnKey;
}

void SetFunction()
{
  byte KeyRead=ReadKey();

  switch (KeyRead)
  {
    case 1:
    {
      Funkce--;
      if (Funkce<1)
      {
        Funkce=4;
      }
      break;
    }
    case 2:
    {
      Funkce++;
      if (Funkce>4)
      {
        Funkce=1;
      }
      break;
    }
    case 3:
    {
      Bright=Bright+64;
      if (Bright>255)
      {
        Bright=63;
      }
      break;
    }
  }
}

void MyDelay(int del)
{
  SetFunction();
  delay(del);
}

void loop()
{
  // put your main code here, to run repeatedly:
  
  SetFunction();
  
  switch (Funkce)
  {
    case 1:
    {
      MaxRead=50;
      OFF();
      break;
    }
    case 2:
    {
      MaxRead=50;
      ON();
      break;
    }
    case 3:
    {
      MaxRead=10;
      Flash01();
      break;
    }
    case 4:
    {
      MaxRead=10;
      Flash02();
      break;
    }

  }

}