DONE!! 
/* Light turning assistant for cars (cornering lights)
Credits to user Dr_P at
http://mjlorton.com forum
(version without tilt sensor)
*/
int fogL = 8; // 55W Relay for L fog lamp
int fogR = 7; // 55W Relay for R fog lamp
int indL = 4; // Circuit between multiswitch and indicator relay
int indR = 2; // Circuit between multiswitch and indicator relay
void setup()
{
pinMode(fogL, OUTPUT);
pinMode(fogR, OUTPUT);
pinMode(indL, INPUT);
pinMode(indR, INPUT);
}
void loop()
{
{
int i=100; // counter initialized with "done" value
if(digitalRead(indR))
{
i=0; //if indicators were reversed, the cycle needs to be reset to full 5s
while(digitalRead(indR) && i<100)
{
i++;
digitalWrite(fogR, HIGH);
digitalWrite(fogL, LOW);
delay(50);
}
}
if(digitalRead(indL)) //same as right side
{
i=0;
while(digitalRead(indL) && i<100)
{
i++;
digitalWrite(fogR, LOW);
digitalWrite(fogL, HIGH);
delay(50);
}
}
if(!digitalRead(indR) && !digitalRead(indL)) // no indicators currently on
if(i==100) //neither indicators were on OR the 5s cycle is over
{
digitalWrite(fogR, LOW);
digitalWrite(fogL, LOW);
}
else //one or both indicators were on for less than 5s
while(!digitalRead(indR) && !digitalRead(indL) && i<100) //but not any more
{
i++; //finish the 5s cycle in the last foglight configuration
delay(50);
}
}
}
Now it works as intended!
Next step - adding the tilt sensor :-)
