digraph G {
   rankdir=LR;
   rank=same;
   bgcolor="transparent";
   uosl1 [label="UOS_Loader"]
   acrn_init [shape=box style="rounded,filled" label="ACRN"]
   acrn_switch [shape=box style="rounded,filled" label="ACRN"]
   uosl2 [label="UOS_Loader"]
   uosl1 -> acrn_init -> "Trusty" -> acrn_switch -> uosl2;
}