'else' without previus if
int ledPin = 13;
int switchPin = 7;
void setup()
{
pinMode(ledPin, OUTPUT);
pinMode(switchPin, INPUT_PULLUP);
}
void loop()
{
if (digitalRead(switchPin) == LOW);
{
flash(100);
}
else
{
flash(1000);
}
}
void flash (int delayPeriod)
{
digitalWrite(ledPin, HIGH);
delay (delayPeriod);
digitalWrite(ledPin, LOW);
delay(delayPeriod);
}