I'm 17 and started programming three years ago. I noticed that my mental focus has declined a fair bit as the daily grind and my work has become easier and eas

I'm 17 and started programming three years ago. I noticed that my mental focus has declined a fair bit as the daily grind and my work has become easier and easier. I generally code in 30 minute bursts (or more, depending on the time of day, my mood, etc). The more challenging the task, the more focus I have.