diff --git a/html/images/nodes4.gif b/html/images/nodes4.gif
deleted file mode 100644
index 6215aa77..00000000
Binary files a/html/images/nodes4.gif and /dev/null differ
diff --git a/html/images/nodes4.png b/html/images/nodes4.png
new file mode 100644
index 00000000..609ecabd
Binary files /dev/null and b/html/images/nodes4.png differ