switch(stan){
        case 1: L1=0; L2=0;
                if(aK1) stan=2;
                break;

        case 2: if(!aK1) stan=3;
                break;

        case 3: L1=1;
                if(aK1) stan=4;
                break;

        case 4: if(!aK1) stan=5;
                break;

        case 5: L2=1;
                if(aK1) stan=6;
                break;

        case 6: if(!aK1) stan=1;
                break;
    }