GUI starting point

Change-Id: Ic7d23bfce0307c4b7cfc9fad9fb5834286ee195c
diff --git a/src/index.scss b/src/index.scss
new file mode 100644
index 0000000..f1df96a
--- /dev/null
+++ b/src/index.scss
@@ -0,0 +1,3 @@
+body {
+  background-color: lightgrey;
+}