diff --git a/619.myco b/619.myco
deleted file mode 100644
index d5aa188..0000000
--- a/619.myco
+++ /dev/null
@@ -1,3 +0,0 @@
-= 619
-https://tomtilley.net/projects/pvc/
-
diff --git a/686.myco b/686.myco
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index 0000000..d83c9bc
--- /dev/null
+++ b/686.myco
@@ -0,0 +1,3 @@
+= 686
+https://nullprogram.com/blog/2023/10/08/
+
diff --git a/Everyday Uses for PVC Water Pipe - Thomas Tilley.myco b/Everyday Uses for PVC Water Pipe - Thomas Tilley.myco
deleted file mode 100644
index 8374c5d..0000000
--- a/Everyday Uses for PVC Water Pipe - Thomas Tilley.myco	
+++ /dev/null
@@ -1,3 +0,0 @@
-= Everyday Uses for PVC Water Pipe - Thomas Tilley
-https://tomtilley.net/projects/pvc/
-
diff --git a/My personal C coding style as of late 2023.myco b/My personal C coding style as of late 2023.myco
new file mode 100644
index 0000000..0015a64
--- /dev/null
+++ b/My personal C coding style as of late 2023.myco	
@@ -0,0 +1,3 @@
+= My personal C coding style as of late 2023
+https://nullprogram.com/blog/2023/10/08/
+