an object
state={
new1:1,
new2:2,
new3:3,
old1:1,
old2:2
}
what should I do if I want to loop out the value of state.new1 state.new2state.new3
do not take out old1 old2
for example, get state.new1 in the first loop and state.new2 in the second time
for(var i=0;i<3;iPP){
state.new1
state.new2
}