blink without delay example for simultaneous functions

Using Arduino Programming Questions
8

Obviously not resetting the random correctly. Also, what are code tags (dumb question).

const byte solOne = 2;
const byte solTwo = 4;

// Time periods of blinks in milliseconds (1000 to a second).
unsigned long solOneinterval = 0;//500
unsigned long solTwointerval = 0;//1000

// Variable holding the timer value so far. One for each "Timer"
unsigned long solOnetimer;
unsigned long solTwotimer;

void setup () 
{
  pinMode (solOne, OUTPUT);
  pinMode (solTwo, OUTPUT);
  solOnetimer = millis ();
  solTwotimer = millis ();
}  // end of setup

void toggleSolOne ()
{
  if (digitalRead (solOne) == LOW)
    digitalWrite (solOne, HIGH);
  else
    digitalWrite (solOne, LOW);

  // remember when we toggled it
  solOnetimer = millis ();
  solOneinterval = 0; [font=Verdana]//////[/font]
}  // end of toggleGreenLED

void toggleSolTwo ()
{
  if (digitalRead (solTwo) == LOW)
    digitalWrite (solTwo, HIGH);
  else
    digitalWrite (solTwo, LOW);

  // remember when we toggled it
  solTwotimer = millis ();
  solTwointerval = 0;[font=Verdana]///////// [/font] 
}  // end of toggleRedLED

void loop ()
{
  solOneinterval = random (100,500);
  if ( (millis () - solOnetimer) >= solOneinterval)
    toggleSolOne ();

  solTwointerval = random (500,1000);
  
  if ( (millis () - solTwotimer) >= solTwointerval) 
    toggleSolTwo ();

  

}