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Very basic Radial Wipe / Opacity expression

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Hey Guys

 

Sorry for asking what is probably a super elementary question. Why doesn't my simple expression below achieve the result of dropping the opacity by 25 for each quarter of completion? Am I missing something basic? Instead it stays at 100% until the final quater where it drops to 25. Im pretty fresh at expressions so hope sorry if such a function is written wrong.

 

Cheers

 

EXPRESSION ON OPACITY

trans=effect("Radial Wipe")("Transition Completion");

 

if (trans<=75 && trans>50){

75}

if (trans<=50 && trans>25){

50}

if (trans<=25 && trans>0){

25} else {100};


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