First init.

libraries/Adafruit_seesaw_Library/examples/digital/multiblink/multiblink.ino

@@ -0,0 +1,30 @@
+/*
+ * This example shows how to blink multiple pins at once on a seesaw.
+ * pin 13 is attached to the LED on the samd11 xplained board
+ */
+
+#include "Adafruit_seesaw.h"
+
+Adafruit_seesaw ss;
+
+//blink pins PA11, PA12, PA13
+uint32_t mask = ((uint32_t)0b111 << 11);
+
+void setup() {
+  Serial.begin(115200);
+  
+  if(!ss.begin()){
+    Serial.println("ERROR!");
+    while(1) delay(1);
+  }
+  else Serial.println("seesaw started");
+
+  ss.pinModeBulk(mask, OUTPUT); //set pin modes
+}
+
+void loop() {
+  ss.digitalWriteBulk(mask, HIGH);   //set pins
+  delay(1000);                       // wait for a second
+  ss.digitalWriteBulk(mask, LOW);   //clear pins
+  delay(1000);  
+}