1 files changed, 3 insertions, 0 deletions

diff --git a/20.md b/20.md
index a3af7a4..0d30c32 100644
--- a/20.md
+++ b/20.md
@@ -156,3 +156,6 @@ reg [2:0] y, Y;
 parameter [2:0] A=3'b001, B=3'b010, C=3'b100;
 ```
 
+---
+
+[Multiple control inputs ->](21.md)