I read that the first traffic light in the United States was installed in Cleveland, Ohio, August 5 1914. That was well before my time, but the force of the signal has been controlling much of our lives ever since. In fact, we don't even give stop lights a thought; we simply obey, much as automatons obey their prewired instructions.
How much simpler would our lives be if we so obeyed the instructions for living which we have been given.
Green light: Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind. This is the first and great commandment.
And the second is like unto it, Thou shalt love thy neighbour as thyself. Matthew 5:37-39
Here is a red light, green light, caution light: Let him eschew evil, and do good; let him seek peace, and ensue it. 1Peter 3:11
Tempted to evil? Stop. See a need? Go, fill it. Seek peace diligently, cautiously and with wisdom.