diff --git a/app/function.png b/app/function.png
new file mode 100644
index 0000000..3c4dec1
Binary files /dev/null and b/app/function.png differ
diff --git a/app/function.svg b/app/function.svg
new file mode 100644
index 0000000..93f9dfc
--- /dev/null
+++ b/app/function.svg
@@ -0,0 +1,92 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="1024"
+   height="500"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.48.5 r10040"
+   sodipodi:docname="function.svg"
+   inkscape:export-filename="C:\Users\ezivkoc\AndroidStudioProjects\UeControl\app\function.png"
+   inkscape:export-xdpi="90"
+   inkscape:export-ydpi="90">
+  <defs
+     id="defs4" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.76"
+     inkscape:cx="555.16797"
+     inkscape:cy="291.42857"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="1261"
+     inkscape:window-height="737"
+     inkscape:window-x="2347"
+     inkscape:window-y="511"
+     inkscape:window-maximized="0" />
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0,-552.36218)">
+    <g
+       id="g3041">
+      <path
+         inkscape:connector-curvature="0"
+         id="path2990-1"
+         d="m 813.6186,663.8598 c -47.33978,0 -85.74068,4.95598 -85.98183,11.08963 l -0.0676,0 0,136.23792 0,136.24838 0.0676,0 c 0,6.16013 38.49712,11.15653 85.98183,11.15653 47.48474,0 85.98186,-4.9964 85.98186,-11.15653 l 0.0676,0 0,-136.24838 0,-136.23792 -0.077,0 c -0.24104,-6.13365 -38.63239,-11.08963 -85.97221,-11.08963 z"
+         style="fill:#0099cc;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:0.30855882;stroke-opacity:0.64327482" />
+      <rect
+         style="fill:#ffffff;fill-opacity:1;stroke:none"
+         id="rect3792"
+         width="55.289764"
+         height="8.2676287"
+         x="785.97229"
+         y="937.31415"
+         ry="2.0563967" />
+      <path
+         sodipodi:type="arc"
+         style="fill:#ffffff;fill-opacity:1;stroke:none"
+         id="path3794"
+         sodipodi:cx="392.7045"
+         sodipodi:cy="122.09631"
+         sodipodi:rx="24.282368"
+         sodipodi:ry="14.234491"
+         d="m 416.98687,122.09631 a 24.282368,14.234491 0 1 1 -48.56474,0 24.282368,14.234491 0 1 1 48.56474,0 z"
+         transform="matrix(0.22343915,0,0,0.30855883,725.87155,642.05125)" />
+      <rect
+         style="fill:#ffffff;fill-opacity:1;stroke:none"
+         id="rect3796"
+         width="150.88423"
+         height="232.52707"
+         x="738.17499"
+         y="690.31683" />
+    </g>
+  </g>
+</svg>