module ProjectGame(HEXVALUE1, HEXVALUE2, HEXVALUE3, HEXVALUE4, HEXLEVEL, STATE, LEDTRUE, LEDFALSE, //Output
RESET, CLOCK, A0,A1,A2,A3,  B4,B5,B6,B7,  C8,C9,C10,C11, D12,D13,D14,D15); //Inputs

output reg [6:0] HEXVALUE1;
output reg [6:0] HEXVALUE2;
output reg [6:0] HEXVALUE3;
output reg [6:0] HEXVALUE4;
output reg [6:0] HEXLEVEL;
output reg [3:0] STATE = 0;
output reg LEDTRUE = 0, LEDFALSE = 0;
input  CLOCK, RESET;
input A0,A1,A2,A3;
input B4,B5,B6,B7;
input C8,C9,C10,C11;
input D12,D13,D14,D15;

initial begin
    HEXVALUE1 = 7'b1111001; //1 0001
    HEXVALUE2 = 7'b0100100; //2 0010
    HEXVALUE3 = 7'b0110000; //3 0011
    HEXVALUE4 = 7'b0011001; //4 0100
    HEXLEVEL =  7'b1111001; //1 0001
end

always @ (posedge CLOCK) begin
    if (RESET == 1) begin
        HEXVALUE1 = 7'b1111001; //1 0001
        HEXVALUE2 = 7'b0100100; //2 0010
        HEXVALUE3 = 7'b0110000; //3 0011
        HEXVALUE4 = 7'b0011001; //4 0100
        HEXLEVEL =  7'b1111001; //1 0001
        LEDFALSE = 0;
        LEDTRUE = 0;
        STATE = 3'b000;
    end
    else begin
        case (STATE)
            3'b000: begin //Level1 -> 4321
                if (LEDTRUE == 1) begin
                    LEDTRUE = 0;
                end
                if ((A0 == 1 && A1 == 0 && A2 == 0 && A3 == 0) && (B4 == 0 && B5 == 1 && B6 == 0 && B7 == 0) && (C8 == 1 && C9 == 1 && C10 == 0 && C11 == 0) && (D12 == 0 && D13 == 0 && D14 == 1 && D15 == 0)) begin
                    if (LEDFALSE == 1) begin
                        LEDFALSE = 0;
                    end
                    LEDTRUE = 1;
                    STATE = 3'b001;
                    HEXVALUE1 = 7'b0011001; //4 0100
                    HEXVALUE2 = 7'b0110000; //3 0011
                    HEXVALUE3 = 7'b0100100; //2 0010
                    HEXVALUE4 = 7'b1111001; //1 0001
                    HEXLEVEL =  7'b0100100; //2 0010
                end
                else begin
                    LEDFALSE = 1;
                    STATE = 3'b000;
                end
            end
            3'b001: begin //Level2 -> 1234
                if (LEDTRUE == 1) begin
                    LEDTRUE = 0;
                end
                if ((A0 == 0 && A1 == 0 && A2 == 1 && A3 == 0) && (B4 == 1 && B5 == 1 && B6 == 0 && B7 == 0) && (C8 == 0 && C9 == 1 && C10 == 0 && C11 == 0) && (D12 == 1 && D13 == 0 && D14 == 0 && D15 == 0)) begin
                    if (LEDFALSE == 1) begin
                        LEDFALSE = 0;
                    end
                    LEDTRUE = 1;
                    STATE = 3'b010;
                    HEXVALUE1 = 7'b0100100; //2 0010
                    HEXVALUE2 = 7'b1111001; //1 0001
                    HEXVALUE3 = 7'b0011001; //4 0100
                    HEXVALUE4 = 7'b0110000; //3 0011
                    HEXLEVEL =  7'b0110000; //3 0011
                end
                else begin
                    HEXVALUE1 = 7'b1111001; //1 0001
                    HEXVALUE2 = 7'b0100100; //2 0010
                    HEXVALUE3 = 7'b0110000; //3 0011
                    HEXVALUE4 = 7'b0011001; //4 0100
                    HEXLEVEL =  7'b1111001; //1 0001
                    LEDFALSE = 1;
                    STATE = 3'b000;
                end
            end
            3'b010: begin //Level3 -> 2143
                if (LEDTRUE == 1) begin
                    LEDTRUE = 0;
                end
                //0010 0001
                if ((A0 == 0 && A1 == 1 && A2 == 0 && A3 == 0) && (B4 == 1 && B5 == 0 && B6 == 0 && B7 == 0) && (C8 == 0 && C9 == 0 && C10 == 1 && C11 == 0) && (D12 == 1 && D13 == 1 && D14 == 0 && D15 == 0)) begin
                    if (LEDFALSE == 1) begin
                        LEDFALSE = 0;
                    end
                    LEDTRUE = 1;
                    STATE = 3'b011;
                    HEXVALUE1 = 7'b0100100; //2 0010
                    HEXVALUE2 = 7'b0110000; //3 0011
                    HEXVALUE3 = 7'b0011001; //4 0100
                    HEXVALUE4 = 7'b1111001; //1 0001
                    HEXLEVEL =  7'b0011001; //4 0100
                end
                else begin
                    HEXVALUE1 = 7'b1111001; //1 0001
                    HEXVALUE2 = 7'b0100100; //2 0010
                    HEXVALUE3 = 7'b0110000; //3 0011
                    HEXVALUE4 = 7'b0011001; //4 0100
                    HEXLEVEL =  7'b1111001; //1 0001
                    LEDFALSE = 1;
                    STATE = 3'b000;
                end
            end
            4'b011: begin //Level4 -> 1432
                if (LEDTRUE == 1) begin
                    LEDTRUE = 0;
                end
                //0010 0011 0100 0001
                if ((A0 == 0 && A1 == 1 && A2 == 0 && A3 == 0) && (B4 == 1 && B5 == 1 && B6 == 0 && B7 == 0) && (C8 == 0 && C9 == 0 && C10 == 1 && C11 == 0) && (D12 == 1 && D13 == 0 && D14 == 0 && D15 == 0)) begin
                    if (LEDFALSE == 1) begin
                        LEDFALSE = 0;
                    end
                    LEDTRUE = 1;
                    STATE = 3'b000;
                end
                else begin
                    HEXVALUE1 = 7'b1111001; //1 0001
                    HEXVALUE2 = 7'b0100100; //2 0010
                    HEXVALUE3 = 7'b0110000; //3 0011
                    HEXVALUE4 = 7'b0011001; //4 0100
                    HEXLEVEL =  7'b1111001; //1 0001
                    LEDFALSE = 1;
                    STATE = 3'b000;
                end
            end
        endcase
    end
end
endmodule