30. PWM with 4-bit Resolution

How do you plan to solve it?

/*Write your code here*/
module pwm4_basic(input wire clk,
input wire rst,input [3:0]duty,
output reg pwm_out);
reg [3:0]cnt;
always @(posedge clk)begin
    pwm_out <= rst ? 1'b0 : (cnt<duty);
    cnt <= rst ? 1'd0 : (cnt + 4'd1);
end
endmodule