I found your problem.
Code:
@ DEVICE PIC16F628A, INTRC_OSC_NOCLKOUT
@ DEVICE PIC16F628A, WDT_ON
@ DEVICE PIC16F628A, PWRT_ON
@ DEVICE PIC16F628A, MCLR_OFF
@ DEVICE PIC16F628A, BOD_OFF
@ DEVICE PIC16F628A, LVP_OFF
@ DEVICE PIC16F628A, CPD_OFF
@ DEVICE PIC16F628A, PROTECT_OFF
'76543210
TRISA = %00000000
TRISB = %00001110
CMCON = 7
VRCON = 0
DEFINE OSC 4
Led1 VAR PORTB.6
Led2 VAR PORTB.5
Led3 VAR PORTB.4
Main:
HIGH Led1
PAUSE 2000
LOW Led1
HIGH Led2
PAUSE 2000
LOW Led2
HIGH Led3
PAUSE 2000
LOW Led3
Goto Main
END
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