First init.

libraries/Adafruit_seesaw_Library/examples/digital/attiny_blink/attiny_blink.ino

@@ -0,0 +1,32 @@
+/*
+ * This example shows how to blink a pin on a seesaw.
+ * It is written to use the built-in LED on the ATtiny817 breakout with seesaw.
+ */
+
+#include "Adafruit_seesaw.h"
+
+Adafruit_seesaw ss;
+
+#define BLINK_PIN 5
+
+void setup() {
+  Serial.begin(115200);
+  
+  while (!Serial) delay(10);   // wait until serial port is opened
+  
+  if(!ss.begin()){
+    Serial.println("seesaw not found!");
+    while(1) delay(10);
+  }
+  
+  Serial.println(F("seesaw started OK!"));
+
+  ss.pinMode(BLINK_PIN, OUTPUT);
+}
+
+void loop() {
+  ss.digitalWrite(BLINK_PIN, LOW);   // turn the LED on (the LED is tied low)
+  delay(1000);                       // wait for a second
+  ss.digitalWrite(BLINK_PIN, HIGH);    // turn the LED off
+  delay(1000);  
+}