diff --git a/week4/etching_example/EtchExample.FCStd b/week4/etching_example/EtchExample.FCStd old mode 100755 new mode 100644 index a6ad33b..a8de89e Binary files a/week4/etching_example/EtchExample.FCStd and b/week4/etching_example/EtchExample.FCStd differ