Designing a safety sign 

In tec, we had to make a safety sign that is not already in the workshop. We had to provide a creative but effective sign to aware people what/not to do. 

My sign means. don't enter the workshop unless you are allowed. I did this sign because I didn't see it around in the workshop and I think it's important to know not to go in the workshop unsupervised. This sign is not only to spread caution but for your own health and safety.