FIRE DIAMOND. People often notice a colored sign on a building called a fire diamond. Fire diamonds located on tanks and buildings indicate the level of chemical hazard located there. The four colors are blue, red, yellow, and white. The numbers superimposed over the colors rank the severity or danger, ranging from one to four, with four being the highest rating.
Minors aged 14 and 15 can work from 7:00 a.m. until 9:00 p.m. while 16- and 17-year-olds can be employed between the hours of 6:00 a.m. until 10:30 p.m. (11:30 p.m on Friday or Saturday or when not regularly attending school) for up to 48 hours per week of school and work combined.
Michigan has laws regarding the minimum legal age to work in the state. And if, in fact, you're old enough to work, there are limits to how many hours you can work per week or per day. There are also differences between the amount of time you can work during the school year versus when you can work when school is out.