Khan Academy Computer Science platform的JavaScript教學 by 朱安強博士
JS003 顏色、迴圈
https://www.khanacademy.org/cs/js003/1663697773JS003-1 Hering illusion
JS003-2 Grid Illusion
https://www.khanacademy.org/cs/grid-illusion/1664265526JS004 判斷式、邏輯符號
https://www.khanacademy.org/cs/js004522/1656378653JS004-1 Cafe wall illusion
https://www.khanacademy.org/cs/caf-wall-illusion/1662355871