how to display enemies on screen

i got a game where different green, red, blue and black aliens to steal a gem at the bottom of the screen!
they way to destroy them is by touching them and they shall explode! my problem is i want them to pop up at random!
instead of it being green red blue black
i always want the order to change randomly because some require more touches than others

how will i be able to implement this?

( dont worry about the sprite sheet ive got that done ) ( i think ) [import]uid: 215264 topic_id: 35903 reply_id: 335903[/import]

Popping up will depend on whether you are using only display objects or the physics engine as well.

Random behaviour can be generated using the math library. Have you seen the online documentation?

http://docs.coronalabs.com/api/

Math lib random() function: http://docs.coronalabs.com/api/library/math/random.html [import]uid: 8271 topic_id: 35903 reply_id: 142709[/import]

No they will not be using the physics in corona [import]uid: 215264 topic_id: 35903 reply_id: 142712[/import]

Popping up will depend on whether you are using only display objects or the physics engine as well.

Random behaviour can be generated using the math library. Have you seen the online documentation?

http://docs.coronalabs.com/api/

Math lib random() function: http://docs.coronalabs.com/api/library/math/random.html [import]uid: 8271 topic_id: 35903 reply_id: 142709[/import]

No they will not be using the physics in corona [import]uid: 215264 topic_id: 35903 reply_id: 142712[/import]

Popping up will depend on whether you are using only display objects or the physics engine as well.

Random behaviour can be generated using the math library. Have you seen the online documentation?

http://docs.coronalabs.com/api/

Math lib random() function: http://docs.coronalabs.com/api/library/math/random.html [import]uid: 8271 topic_id: 35903 reply_id: 142709[/import]

No they will not be using the physics in corona [import]uid: 215264 topic_id: 35903 reply_id: 142712[/import]

Popping up will depend on whether you are using only display objects or the physics engine as well.

Random behaviour can be generated using the math library. Have you seen the online documentation?

http://docs.coronalabs.com/api/

Math lib random() function: http://docs.coronalabs.com/api/library/math/random.html [import]uid: 8271 topic_id: 35903 reply_id: 142709[/import]

No they will not be using the physics in corona [import]uid: 215264 topic_id: 35903 reply_id: 142712[/import]