diff --git a/static/img/robot.png b/static/img/nok.png
similarity index 100%
rename from static/img/robot.png
rename to static/img/nok.png
diff --git a/static/img/ok.png b/static/img/ok.png
new file mode 100644
index 0000000..711f098
Binary files /dev/null and b/static/img/ok.png differ