将ASCII码按顺序在屏幕上竖列显示。

要求：

（1）逐个显示字符，相邻的两个字符之间显示要有时间间隔。

（2）字符颜色为绿色。

（3）每列显示20个字符，列间距为5个字符。显示完128个ASCII码，共需7列。

-The ASCII code sequence vertical columns displayed on the screen.

Requirements:

(1) by-character display, the display between two adjacent characters have a time interval.

(2) the character color is green.

(3) displays 20 characters per row, column spacing is 5 characters. After the display 128 ASCII codes, totaling seven.