add node
add node
add node
add node
add node
edges random
layout circular
setall nodes -oc green -fc lightblue
sleep 2
setall nodes -oc black -fc red
sleep 2
setall nodes -oc green -fc lightblue
sleep 2
setall nodes -oc black -fc red
sleep 2
setall nodes -oc green -fc lightblue -s 20