Not all things that happen are from God: Either God has allowed something to happen, or God intervenes and causes something to happen. God accomodates for everything that takes place and has worked it out for His own purpose.
A light turning green or someone saying something to you, does not necessarily mean they are from God.. But that doesn't mean God hasn't intervened with traffic lights before (or more likely the timing in which you come into contact with this light), or not inspired someone to say something to someone else.
Proverbs 16:4 (Amplified) - The Lord has made everything [to
accommodate itself and contribute] to its own end and His own
purpose--even the wicked [are fitted for their role] for the day of
calamity and evil.