Counters- Decade counter

DECADE COUNTER
module decadecounter(q,clk,reset);
output [3:0]q;
input clk,reset;
reg [3:0]q;
always @(posedge clk)
begin
if(reset|q<=4'b0000)
q<=4'b1111;
else
q<=q-1;
end

endmodule