Cannot get my e paper to work

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user80458
Hi Gorden, the e-ink display is from https://www.smart-prototyping.com/E-ink-E-paper-new-version-display-module-3.3V-2.04-inch-177x72.html
I tried to use g.drawCircle() to display some circle, the result is fine.
```
        display.g.drawCircle(100,40,30);
         display.g.drawCircle(40,40,30);
        display.g.drawCircle(140,40,30);
```
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