diff --git a/stemgroup/linuxperformance.png b/stemgroup/linuxperformance.png
new file mode 100644
index 0000000000000000000000000000000000000000..9d760b4a28a37095582860f89bae96fafcf74312
Binary files /dev/null and b/stemgroup/linuxperformance.png differ
diff --git a/stemgroup/nano.png b/stemgroup/nano.png
new file mode 100644
index 0000000000000000000000000000000000000000..0270ea27d9afe78b1ad0006ef265d2578f917dd9
Binary files /dev/null and b/stemgroup/nano.png differ