tetris problem by ashmawy

void myDisplay() {     //printf("%s", reachedFloor ? "true" : "false");     if(dropedItemY==endItemDown)     {         reachedFloor=true;         printf("here");     }     if(reachedFloor)     {         item = rand()%7;         dropedItemY=SIZE_OF_Y;         dropedItemX=0;         switch(item)         {             case 0: //I                 endItemDown=-SIZE_OF_Y;                 endItemLeft=-SIZE_OF_X;                 endItemRight=SIZE_OF_X-(3*SIZE_OF_SQUARE);                 break;             case 1: //T                 endItemDown=-SIZE_OF_Y+(SIZE_OF_SQUARE);                 endItemLeft=-SIZE_OF_X;                 endItemRight=SIZE_OF_X-(2*SIZE_OF_SQUARE);                 break;             case 2: //O                 endItemDown=-SIZE_OF_Y+SIZE_OF_SQUARE;                 endItemLeft=-SIZE_OF_X;                 endItemRight=SIZE_OF_X-(2*SIZE_OF_SQUARE);                 break;             case 3: //L                 endItemDown=-SIZE_OF_Y+(SIZE_OF_SQUARE);                 endItemLeft=-SIZE_OF_X;                 endItemRight=SIZE_OF_X-(2*SIZE_OF_SQUARE);                 break;             case 4: //J                 endItemDown=-SIZE_OF_Y+(SIZE_OF_SQUARE);                 endItemLeft=-SIZE_OF_X;                 endItemRight=SIZE_OF_X-(2*SIZE_OF_SQUARE);                 break;             case 5: //S                 endItemDown=-SIZE_OF_Y+(2*SIZE_OF_SQUARE);                 endItemLeft=-SIZE_OF_X;                 endItemRight=SIZE_OF_X-(2*SIZE_OF_SQUARE);                 break;             case 6: //Z                 endItemDown=-SIZE_OF_Y+(SIZE_OF_SQUARE);                 endItemLeft=-SIZE_OF_X;                 endItemRight=SIZE_OF_X-(2*SIZE_OF_SQUARE);                 break;         }         reachedFloor=false;     }     if(!reachedFloor)     {         glMatrixMode(GL_PROJECTION);         glLoadIdentity();         gluOrtho2D(-SIZE_OF_X,SIZE_OF_X,-SIZE_OF_Y,SIZE_OF_Y);         glutTimerFunc(10,myTimer, 1);         dropedItemY--;     }     glClear(GL_COLOR_BUFFER_BIT);     glPushMatrix();     if(item==0)         DrawI(dropedItemX,dropedItemY);     else if(item==1)         DrawT(dropedItemX,dropedItemY);     else if(item==2)         DrawO(dropedItemX,dropedItemY);     else if(item==3)         DrawL(dropedItemX,dropedItemY);     else if(item==4)         DrawJ(dropedItemX,dropedItemY);     else if(item==5)         DrawS(dropedItemX,dropedItemY);     else if(item==6)         DrawZ(dropedItemX,dropedItemY);     glPopMatrix();     glFlush();      }