module part5(CLOCK_50, HEX0);
    input CLOCK_50;
    output [0:6]HEX0;
    reg [25:0] R;
    reg [3:0] N;
    always @(posedge CLOCK_50) begin
        if (R < 49999999) R <= R + 26'b1;
        else begin
            R <= 26'b0;
            if (N < 9)  N <= N + 4'b1;
            else N <= 4'b0;
        end
    end
    seg7 s0(N,HEX0);
endmodule

module seg7(C, H);
    input [3:0] C;
    output [0:6] H;
    assign H[0] = (~C[3]&~C[2]&~C[1]&C[0])|(C[2]&~C[1]&~C[0]);
    assign H[1] = C[2]&(C[1]^C[0]);
    assign H[2] = (~C[2]&C[1]&~C[0]);
    assign H[3] = H[0]|(C[2]&C[1]&C[0]);
    assign H[4] = C[0]|(C[2]&~C[1]);
    assign H[5] = (~C[3]&~C[2]&C[0])|(C[0]&C[1])|(C[1]&~C[2]);
    assign H[6] = (~C[3]&~C[2]&~C[1])|(C[2]&C[1]&C[0]);
endmodule