static void Main(string[] args)
{
Copier copier = new Copier();
Console.WriteLine($"Current copier state: {copier.GetState()}");
copier.PowerOn();
Console.WriteLine($"Current copier state: {copier.GetState()}");
var doc = new PDFDocument("doc.pdf");
copier._Printer.Print(doc);
copier._Printer.Print(doc);
copier._Printer.Print(doc);
//cooling down after 3 prints
copier._Printer.Print(doc);
copier._Scanner.Scan();
copier._Scanner.Scan();
//cooling down after 2 scans
copier._Scanner.Scan();
copier.GetCounter();
Console.WriteLine($"Current copier state: {copier.GetState()}");
copier.PowerOff();
Console.WriteLine($"Current copier state: {copier.GetState()}");
}