watch for about thirty seconds before you say to yourself 
(ROOT (S (VP (VB watch) (PP (IN for) (NP (QP (RB about) (CD thirty)) (NNS seconds))) (SBAR (IN before) (S (NP (PRP you)) (VP (VBP say) (PP (IN to) (NP (PRP yourself)))))))))
(ROOT (S (VP (VB ) (PP (IN ) (NP (QP (RB ) (CD )) (NNS ))) (SBAR (IN ) (S (NP (PRP )) (VP (VBP ) (PP (IN ) (NP (PRP )))))))))