diff --git a/blinky/blinky.v b/blinky/blinky.v
index dc8a726..5cf1ffb 100644
--- a/blinky/blinky.v
+++ b/blinky/blinky.v
@@ -11,7 +11,9 @@ module blinky(i_clk, o_led, lcol1);
    always @(posedge i_clk)
       counter <= counter + 1'b1;
 
-   assign o_led = counter[WIDTH-1];
+   assign o_led = counter[WIDTH-1]; // normal, symmetrical blinking
+   // assign o_led = ~(&counter[WIDTH-1:WIDTH-3]); // short on, long off (strobe)
+   // assign o_led = ~(counter[5:0] < counter[WIDTH-1:WIDTH-6]); // PWM, dimmer
    assign lcol1 = 1'b0;
 endmodule