ERROR MESSSAGE

Hello, I have an error message and I don't know where it comes from. Someone can help me please ...

EXPECTED WHILE BEFORE { TOKEN

float lum = 0.8;//deja marquer dans l autre programme

int volet = 12;
int niveaudemande = 11;
int captlumint = A1;
int lumext = 10;
const int LED = 3;//déclaration constante de broche
int i = 0;//variable de boucle

void setup() {
pinMode(LED, OUTPUT);
pinMode(volet,OUTPUT);
}

void loop() {

if(lumext > lum);
{
do( volet = 0);//volets fermés
{
if(captlumint < niveaudemande);
{
for(i=0; i<niveaudemande;i++)//boucle qui va de 0 à niveaudemandé
{
analogWrite(LED,i);//génére une impulsion sur la broche de largeur i=la lum augmzente
delay(10); //pause de 10ms entre chaques cran
}}
else{
for(i=0; i<niveaudemande;i++);{
analogWrite(LED,niveaudemande-i);//largeur niveau demandé moins i lum baisse
delay(10);
}}
}
}

else;
{
do( volet = 1);
{
if(captlumint < niveaudemande);
{
for(i=0; i<niveaudemande;i++);//boucle qui va de 0 à niveaudemandé
{
analogWrite(LED,i);//génére une impulsion sur la broche de largeur i=la lum augmente
delay(10); //pause de 10ms entre chaques cran
}}
else{
baisser volet;
while(captlumint>niveaudemande);
}

}
}
}

if (lumext> lum); 
{ 
do (pane = 0);

Semicolon oops2

Please remember to use code tags when posting code

baisser volet;

The compiler doesn't understand pseudocode.

do( volet = 1); = oops, semicolon oops.

Take a hard look at when and where you use semicolons and where you shouldn't

Not on the end of an if test
Not on the end of a for loop
Not immediately after else
Not at the end of a while statement

etc
etc

You also need to go look at the reference for the do - while construct. You CANNOT have a do without a while at the end.