How do you plan to solve it?
module tick_div4( input wire clk, input wire rst, output reg tick ); reg [1:0] cnt; always @(posedge clk) begin if(rst) begin tick<=0; cnt<=0; end else begin cnt<=cnt+2'b01; if(cnt==2'b11) tick<=1'b1; else tick<=1'b0; end end endmodule