Project guidance: how move a bar with a button

hello everyone, new in beautiful world , doing experiment school. have bar moves horizontally. bar operated button has 2 limit once press of button bar goes far right. press button again , moves left limit. able control motor button can not make stop when operate limit. in conclusion 4: 1) limit right pull down action no limit left no 2) limit right pull down pull down action left no limit 3) limit right no action pull down limit left no 4) right limit no limit no action left pull down. looking on internet felt have enter variable motion have no idea how do.


please me.

thanks all.

g_w_h

p.s.: can't upload jpg , post circuit on link http://imagebin.ca/v/1lzuxdjcs18b

i find post raises more questions answers.

for sake of others may want follow post i'm attaching picture link to.

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