I think I have a coding error

actually the error says expected " ;" before " { "

( I had put the wrong bracket in on my original question)

Hello, remove the last semicolon from this cycle definition:

for{int j=1; j<=numRedBlink;j=j+1};

EDIT: One more thing: there is one more closing curly bracket than needed in the loop function.

PS: formatting the section as code much improves readability:

int redLED=8; //declaring redLED as an int and set in 8 position
int yellowLED=9;// declaring yellowLED as an int and set in postipn 9
int redOnTime = 500; //red LED is set to be on 500 milliseconds or a half second
int redOffTime= 500; //red LED is set to be off for 500 milliseconds or half a second
int yellowOnTime = 1000; //yellow is set to be on for 1000 milliseconds
int yellowOffTime = 500; //yellow LED is set to be off half a second
int numRedBlink=6; //j will be my counter in for loop
    
void setup() {
  pinMode { redLED, OUTPUT };
  pinMode { yellowLED, INPUT};
}
  
void loop() {
  for{int j=1; j<=numRedBlink;j=j+1};  { 
     digitalWrite{redLED, HIGH}; //turn red LED on
     delay {redOnTime}; //wait
     digitalWrite {redLED, LOW}; // turn red LED off
     delay {redOffTime}; //wait

     digitalWrite{yellowLED, HIGH}; //turn yellow LED on
     delay {yellowOnTime}; //wait
     digitalWrite{yellowLED,LOW}; //turn yellow LED off
     delay{yellowOffTime}; //wait
}

PS: formatting the section as code much improves readability:

int redLED=8; //declaring redLED as an int and set in 8 position
int yellowLED=9;// declaring yellowLED as an int and set in postipn 9
int redOnTime = 500; //red LED is set to be on 500 milliseconds or a half second
int redOffTime= 500; //red LED is set to be off for 500 milliseconds or half a second
int yellowOnTime = 1000; //yellow is set to be on for 1000 milliseconds
int yellowOffTime = 500; //yellow LED is set to be off half a second
int numRedBlink=6; //j will be my counter in for loop
    
void setup() {
  pinMode { redLED, OUTPUT };
  pinMode { yellowLED, INPUT};
}
  
void loop() {
  for{int j=1; j<=numRedBlink;j=j+1};  { 
     digitalWrite{redLED, HIGH}; //turn red LED on
     delay {redOnTime}; //wait
     digitalWrite {redLED, LOW}; // turn red LED off
     delay {redOffTime}; //wait

     digitalWrite{yellowLED, HIGH}; //turn yellow LED on
     delay {yellowOnTime}; //wait
     digitalWrite{yellowLED,LOW}; //turn yellow LED off
     delay{yellowOffTime}; //wait
}