21     let litButton = new LitButton();  variable
25     let litButton = new LitButton();  variable
30     let litButton = new LitButton();  variable
35     let litButton = new LitButton();  variable
40     let litButton = new LitButton();  variable
45     let litButton = new LitButton();  variable
50     let litButton = new LitButton();  variable
55     let litButton = new LitButton();  variable
60     let litButton = new LitButton();  variable
65     let litButton = new LitButton();  variable
70     let litButton = new LitButton();  variable
75     let litButton = new LitButton();  variable
80     let litButton = new LitButton();  variable
85     let litButton = new LitButton();  variable