diff --git a/ch4/timebase.sv b/ch4/timebase.sv
index e66f979..d04bc37 100644
--- a/ch4/timebase.sv
+++ b/ch4/timebase.sv
@@ -1 +1,8 @@
-`timescale 1ns/1ps
+module timebase 
+   (input logic clk,
+    input logic reset,
+    output logic [?:0] count);
+
+
+
+endmodule