Someone

module seg_dec(clk, vin, cry, vout);
    input clk;
    input [3:0] vin;
	 input cry;
    output reg [6:0] vout;

always @ (posedge clk)
	begin
		if (cry == 1) vout <= 7'b1111110; //egy - jel látszik
		else begin		
			if (vin == 4'd0) vout <= 7'b0000001; //nulla
			else if (vin == 4'd1) vout <= 7'b1001111; //egy
			else if (vin == 4'd2) vout <= 7'b0010010; //kett&#337;
			else if (vin == 4'd3) vout <= 7'b0000110; //három
			else if (vin == 4'd4) vout <= 7'b1001100; //négy
			else if (vin == 4'd5) vout <= 7'b0100100; //öt
			else if (vin == 4'd6) vout <= 7'b0100000; //hat
			else if (vin == 4'd7) vout <= 7'b0001111; //hét
			else if (vin == 4'd8) vout <= 7'b0000000; //nyolc
			else if (vin == 4'd15) vout <= 7'b1111111; //F-nél üres szegmens
			else vout <= 7'b0000100; //kilenc, illegális értéknél is (kivéve F)
		end
	end
	//szegmens dekóder
endmodule