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21 lines
459 B
Plaintext
21 lines
459 B
Plaintext
import processing.io.*;
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// GPIO numbers refer to different phyiscal pins on various boards
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// On the Raspberry Pi GPIO 4 is physical pin 7 on the header
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// see setup.png in the sketch folder for wiring details
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void setup() {
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GPIO.pinMode(4, GPIO.INPUT);
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}
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void draw() {
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// sense the input pin
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if (GPIO.digitalRead(4) == GPIO.HIGH) {
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fill(255);
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} else {
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fill(204);
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}
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stroke(255);
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ellipse(width/2, height/2, width*0.75, height*0.75);
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}
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