Multiple LED's blink without delay

i have array of 11 pins. trying sequence going leds blink on , off outside in middle.

0  -  -  -  -  -  -  -  -  -  0  
-  0  -  -  -  -  -  -  -  0  -
-  -  0  -  -  -  -  -  0  -  -
-  -  -  0  -  -  -  0  -  -  -
-  -  -  -  0  -  0  -  -  -  -
-  -  -   -  -  0  -  -  -  -  -

0 = led on.

i can delays coding individual pins manually.

i have been using blink without delay example.
the problem having led board using inverted
so high led's off , low led's on.

the problem every second led turning on 1 @ time , not blinking. once these on, other led's start blinking. not seem incrementing through arrays 1 pin @ time.

my code is:

code: [select]


int index = 0;
int ledpins[] = {
 9,8,7,6,5,4,3,2,14,15,16};

int ledstate = high;

unsigned long currentmillis = millis();
unsigned long previousmillis = millis();
long interval = 1000;

int x = 0;
int test1l[] = {
 9,8,7,6,5};
int test1r[] = {
 16,15,14,2,3};

void setup()
{
 serial.begin(19200);

 for(index = 0; index < 11; index++)
 {
   pinmode(ledpins[index], output);
 }
 for(int = 0; < 11; i++)
 {
   digitalwrite(ledpins[i], high);
 }
}

void loop()
{  
 unsigned long currentmillis = millis();

 analogwrite(11, 0);
 analogwrite(12, 0);
 analogwrite(13, 255);
 
 if(currentmillis - previousmillis > interval)
 {
   previousmillis = currentmillis;
   
   if (ledstate == high)
   {
     ledstate = low;
   }
   else
   {
     ledstate = high;
   }
   analogwrite(11, 0);
   analogwrite(12, 0);
   analogwrite(13, 255);

   digitalwrite(test1l[x], ledstate);
   digitalwrite(test1r[x], ledstate);

   x++; //increment x pins
 }
 if(x > 4)
 {
   digitalwrite(4, ledstate); //blink middle led
   x = 0;
 }  
}


simplified code bit, find 7 differences

code: (not tested) [select]


int ledpins[] = {
  9,8,7,6,5,4,3,2,14,15,16};

unsigned long previousmillis = 0;
unsigned long interval = 1000;

int x = 0;

void setup()
{
  serial.begin(19200);

  for(int i= 0; < 11; i++)
  {
    pinmode(ledpins[i], output);
    digitalwrite(ledpins[i], high);
  }
}

void loop()
{ 
  unsigned long currentmillis = millis();

  if (currentmillis - previousmillis >= interval)
  {
    previousmillis = currentmillis;
   
    // switch off
    digitalwrite(ledpins[x], high);       // left
    digitalwrite(ledpins[9-x], high);  // right

     x++;
     if (x == 4) x = 0;

    // switch on
    digitalwrite(ledpins[x], low);       // left
    digitalwrite(ledpins[9-x], low);  // right

    digitalwrite(4, !digitalread(4));  //invert middle led every step

  }
}


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