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Completed at: 2023-07-06T20:13:44.092Z
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Completed languages: java
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Tags: Fundamentals
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Rank: 8 kyu
You're writing code to control your town's traffic lights. You need a function to handle each change from green, to yellow, to red, and then to green again.
Complete the function that takes a string as an argument representing the current state of the light and returns a string representing the state the light should change to.
For example, when the input is green, output should be yellow.
In C the state of the light is represented by an `enum`, not a string.