digraph G {
    graph[dpi=300 fontsize=14 fontname="Courier New"];
    node[shape=rectangle style="filled" fillcolor="#fafafa" penwidth=0.5 color="#aaaaaa"];
    edge[arrowsize=0.3 color="#444444"]

    node_begin [label="x = ...;\l"]
    node_cond [label="x\l"]
    node_body [label="x = x - 1\l"]
    node_end [label="y = x\l"]

    node_begin -> node_cond
    node_cond -> node_body
    node_cond -> node_end
    node_body -> node_cond
}