Leds on/off

[Leonardo]

Hello forum friends,

I have 4 buttons connected to PORTB and 4 LEDs to PORTB, I turn on and off with the same button for the LED but independently, with this code does not work properly any suggestions?.

start:
IF PORTB.0=0 then
    HIGH PORTB.4
    WHILE PORTB.0=0 : Wend : pause 50
    ENDIF
    
IF PORTB.0=0 then
    LOW PORTB.4
    WHILE PORTB.0=0 : Wend : pause 50
    ENDIF
    
    
iF PORTB.1=0 then
    HIGH PORTB.5
    WHILE PORTB.0=0 : Wend : pause 50
    ENDIF
    
IF PORTB.1=0 then
    LOW PORTB.5
    WHILE PORTB.0=0 : Wend : pause 50
    ENDIF
    
iF PORTB.2=0 then
    HIGH PORTB.6
    WHILE PORTB.0=0 : Wend : pause 50
    ENDIF
    
IF PORTB.2=0 then
    LOW PORTB.6
    WHILE PORTB.0=0 : Wend : pause 50
    ENDIF
    
iF PORTB.3=0 then
    HIGH PORTB.7
    WHILE PORTB.0=0 : Wend : pause 50
    ENDIF
    
IF PORTB.3=0 then
    LOW PORTB.7
    WHILE PORTB.0=0 : Wend : pause 50
    ENDIF
    
      
goto start