Press your pen button and then press down on the image of the light bulb.
请按一下笔的按钮，然后按下电灯泡的图像。
If you pressed the button correctly, you will see an option to turn on the light bulb.
如果您按的按钮正确，您会看见打开电灯的选项。
Turn on execution highlighting by clicking on the highlight execution button, so that the light bulb changes to the active (lighted) state.
点击高亮执行按钮使程序高亮执行，灯泡变为点亮的状态。
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