Random enemy movement

[fadgeplaysgames]

Has anyone got some example code for random enemy movement? I have tried various was to get a horizontally patrolling enemy that changes direction at random intervals. I must be doing something wrong because they only seem to go in one direction. 

[alessandro]

Hi, I don't know if this suits you because it was made for the fifth chapter of Cousin Horace, a platform and ladders enviroment disguised as a maze viewed from above. You might want to adapt the script to your needs. The script operates a random value check so that, if the sprite hits a ladder (IF LADDERABOVE / IF LADDERBELOW) and that value is 0, then it goes up or down accordingly, otherwise it checks whether it should continue moving in the same horizontal direction or change it.
IF DIRECTION = 0
IF LADDERABOVE
SPRITEUP
ELSE
GETRANDOM 2
IF RND = 0
LET DIRECTION 2
ELSE
LET DIRECTION 3
ENDIF
ENDIF
ENDIF
IF DIRECTION = 1
IF LADDERBELOW
SPRITEDOWN
ELSE
GETRANDOM 2
IF RND = 0
LET DIRECTION 2
ELSE
LET DIRECTION 3
ENDIF
ENDIF
ENDIF
IF DIRECTION = 2
IF CANGOLEFT
SPRITELEFT
ELSE
LET DIRECTION 3
ENDIF
GETRANDOM 4
IF RND = 0
IF LADDERABOVE
LET DIRECTION 0
ELSE
IF LADDERBELOW
LET DIRECTION 1
ENDIF
ENDIF
ENDIF
ENDIF
IF DIRECTION = 3
IF CANGORIGHT
SPRITERIGHT
ELSE
LET DIRECTION 2
ENDIF
GETRANDOM 4
IF RND = 0
IF LADDERABOVE
LET DIRECTION 0
ELSE
IF LADDERBELOW
LET DIRECTION 1
ENDIF
ENDIF
ENDIF
ENDIF


[fadgeplaysgames]

thanks for the advice. Is there any way to get the sprite to change direction without it passing a certain trigger (like a ladder)?
What I was trying to do was have a simple loop (e.g. if a=8 let a=0 else add 1 to a), then in the sprite event, have something like
if a=2
getrandom 2
if rnd = 0
let parama = 0
else
let parama = 1
endif
endif

then have the parama decide the direction the sprite walks in.
all that happens is the sprite walks in one direction continuously. I thought the loop would trigger the getrandom over and over, but it doesnt seem to do that?